Or INTP, or INFP. A lot of what you said sounds like what I would say, which is Ne. BUT, a lot of what you said doesn't. I don't know.
There is actually a game about autism, and it is exactly this.
"I was overwhelmed by all the noise and the screaming and children running around so fast (they were friggin' barbarians). UGH."
That is sensory overload. Sensory overload - Wikipedia, the free encyclopedia
I identify with Ti, but what if I use Te?
What if Si>Se?
What if- NO PLEASE STAHP
Ne. Asking what if questions is an Ne thing.
I relate to what a lot of you said. It could be because ISTJ and INFP share the same functions in a similar order, but I don't know. You seem to have multiple psychoses, and I don't know.
When I was little, I did the exact same thing in kindergarten. I was like "Why is everybody talking? That is against the rules!".
Formed my personality mostly since, or was a result of my forming personality.
Fi is an impossible thing to describe. So that is my description. You interpret data based on your feelings?
Ti and Fi are often confused because they are so similar. Both are the same type of function, the interpreting function.
An Fi user who does not mask this would break into some kind of random dance, while a Ti user would analyze our insanity, while a Te user would be like "STAHP!"
Am I right? I really don't know.
An Fe user would do whatever seems most socially acceptable.
Problem is, most Fi users mask their Fi in Ne. It is because logic is so much more valued in this world. Fi + Ne looks like Ti + Ne. Also, your description of Si reminds me of myself.
I really don't know whether ISTJ or INFP. You question a TON. Ne is strong with thee. My next question is whether you focus upon tangible things, or fantasy land type stuff.
In conclusion, I don't know, but probably not Ti. Ti and Fi cannot be seen with the naked eye except with the combination of Ne or Fe or Te. You don't have Se.
Oh and you lack Fe so you are a Te/Fi user.
Conclusion is that you are INFP/ISTJ, and I don't know anymore than that.
Questions to answer: Do you tend to think more about fantasy or about more tangible things? Do you have indescribable feelings about things?
Hope the Wikipedia article on sensory overload helped though.
And I grew up in a similar environment, less the sensory overload, so I can relate.