I think functions might give some insight.
INFP: Fi - Ne - Si - Te
INFJ: Ni - Fe - Ti - Se
ISFP: Fi - Se - Ni - Te
I don't think you're INFJ. Since Fi isn't really even listed in the INFJ line up. (Based on my knowledge of you and some assumptions I think you relate most to Fi. Could be wrong.)
If you look at INFP and ISFP they are pretty close. I think the main question is, wither you're a sensor or a intuitive. Concrete, abstract.
I think it's also important to note that people usually show their inferior functions more so when they are stressed. So that could definitely screw some results up. For example, when I'm really stressed I sometimes get ISTJ. This also raises the question of not only Si and Ni (depending on INFP or ISFP) but also I remember where you were once questioning F vs T (INXP). Most certainly your Te would be acting up if your levels of stress are higher than usual, thus resulting in high T scores.
If you really do relate most to Fi, then I think you can ignore INFJ. And if you define Fi as your dominate then the question of secondary comes in, Ne or Se? Which comes again to the question of sensor or intuitive.
Here's some definition,
Se:
Extroverted Sensors love experiencing the physical world in an active, engaged way. They have an enviable natural sensualness and comfortableness with their bodies and all things physical. They are aware of and appreciate the rich detail of the sensory world, and can become totally absorbed in taking in sensory data - sounds, smells, images, textures, and tastes until exhausted or distractd. Yet, somehow, they can pick out the relevant details from the flood of information coming in, and act on them. They will know the names of the restaurants, the stats on all the football players - for them, life itself is a game of Trivial Pursuit™
Extroverted Sensors live in the present tense - or rather the immediate tense. They seek to gain as much pleasure as possible from this very moment. Because they are so immediate tense and can move easily from one focus to another, they can leave others with the impression they are hyperactive or unfocused. Rather than being energized by observing the external world, they are energized by participating in it. They are agile and graceful, and often athletic. Unlike their talkative counterparts, these Extroverts use physical action as their way of expressing themselves.
Se is about achieving an object of desire. It gives one the ability to influence, bend, and push situations and people in order to achieve such an object, rather than to enjoy the situation one is in.
Ne:
Extroverted iNtuitives live in the world of ideas and possibilities. They see where the world, and the people in it, could be more easily than where they currently are. Like the magician pulling a rabbit from the hat, the Extroverted iNtuitives can see patterns, options and possibilities that seem to come from nowhere. They thrive on variety and change, and throw themselves into their projects and ideas whole-heartedly, even the ones that seem impossible to achieve. They are change agents and "Pied Pipers", with an almost contagious enthusiasm that inspires others to follow where they lead, including fellow leaders. Ingenious, innovative, boundary-breakers who challenge - and sometimes even trample -- the status quo to move everyone toward a better future.
Extroverted iNtuitives are very expressive and communicative. They love the world of words, are the masters of metaphors, analogies, and word play. They always have a story to tell, and often use their stories to help motivate others. They can integrate many different ideas into a whole, and are good with generating new theories and brainstorming.
Ne is generally associated with the ability to recognize possibilities, create new opportunities and new beginnings, recognize talent and natural propensities in others, reconcile differing perspectives and viewpoints, rapidly generate ideas, and be led by one's intellectual curiosity and stimulate curiosity in others.
So I guess it's up to you to decide.
In the end I think you're an INFP who is trying to find herself and dealing with stresses of life while doing that. Letters only represent personality though, it's trying to name the nameless, MBTI is never 100% accurate. The letters don't matter, it's the personality, that matters.
Ne, I'd say. Actually, I agree with you in some way, letters are just letters. I feel like the infj description fits me more, I've asked a few family members who have agreed. My mother told me that I was actually more organized before I started having all these problems...She's right.

But thank you very much for the s and n description, this clears any doubts in my mind.

I just wanted to pinpoint exactly what made me question being infp was when I read this in the infj description:
http://www.personalitypage.com/INFJ.html:
-"constantly define and re-define the priorities in their lives","They know things intuitively, without being able to pinpoint why, and without detailed knowledge of the subject at hand.
They are usually right(ahem let's not get carried away

I believe i'm right at the moment but it's not always the case.), and they usually know it. Consequently, INFJs put a tremendous amount of faith into their instincts and intuitions".
-"INFJs are
concerned for people's feelings, and try to be gentle to avoid hurting anyone. They are very
sensitive to conflict, and cannot tolerate it very well. Situations which are charged with conflict may drive the normally peaceful INFJ into a state of
agitation or charged anger. They may tend to
internalize conflict into their bodies, and experience health problems when under a lot of stress.(I have a few stories on that one)
-"This may result in an INFJ stubborness and
tendency to ignore other people's opinions. They believe that they're right. On the other hand, INFJ is a perfectionist who
doubts that they are living up to their full potential. INFJs are rarely at complete peace with themselves - there's always something else they should be doing to improve themselves and the world around them. They
believe in constant growth, and don't often take time to revel in their accomplishments. They have strong value systems, and need to live their lives in accordance with what they feel is right. In deference to the Feeling aspect of their personalities, INFJs are in some ways gentle and easy going.
-INFJ is a natural nurturer;
patient, devoted and
protective(I've been told I mother people who are close to me and am overprotective quite often by these same people.)
* May be unaware (and sometimes uncaring) of how they come across to others
* May quickly dismiss input from others without really considering it
* May apply their judgment more often towards others, rather than towards themselves
*
With their ability to see an issue from many sides, they may always find others at fault for any problems in their lives(oops..)
* May have unrealistic and/or unreasonable expectations of others
* May be intolerant of weaknesses in others
* May
believe that they're always right(boy do I piss people when I do that

)
* May be
obsessive and passionate about details that may be unimportant to the big picture
*
May be cuttingly derisive and sarcastic towards others
*
May have an intense and quick
temper(not quick, nope)
* May be
tense, wound up, have high blood pressure and
find it difficult to relax
*
May hold grudges, and have difficulty forgiving people(this is my number one flaw, very unforgiving)
* May be wishy-washy and unsure how to act in situations that require quick decision making
* May have difficulty communicating their thoughts and feelings to others
*
May see so many tangents everywhere that they can't stay focused on the bottom line or the big picture
These are the things that made me question being an infp.