Not knowing your own feelings is at odds with being INFP, or Fi-dominant for that matter. I don't mean emotions, but value concepts.
People think anyone who is sensitive and feels misunderstood is INFP. In which case, are most teenagers INFP?
I agree the OP sounds like an enneagram 9. Not knowing what you want and just doing something out of pressure from others is a sign of 9. Unhealthy 4s get nasty and bite you and then retreat to their lair.
It's hard to Jungian type some 9s, as young ones who are, say, low-average dont seem to have a clear sense of self. People seem to frequently mistype 9s as INFP, yet INFP e9s more commonly have a stronger sense of self than common to other e9s - same with their value concepts.
The OP is right to question a lack of knowing what is important to her as a strong indicator she may not be an Introverted Feeling type.
Lol I suddenly wonder if I could be INFJ instead.
I seemed to see some Ni and Fe in myself.
For example, once I set a goal, I am very stubborn and I just have to achieve that goal, and I can never feel happy until THAT specific goal manifest into reality.
INFJs are said to be lead Ni and they often have an inner vision of how things should be like, and I seemed to see this tendency in myself. One of my biggest goal at the moment, for example, is to become self-employed and work for myself, and this is what I envisioned myself doing as a career for an entire lifetime.
But my family doesn't really approve of this career choice of mine, and this frustrates me deeply, I hate having to change my original plans and goals, I hate the fact that my goals are unable to manifest into reality. In my mind, this is what my ideal career should be like, I should be working for myself, and I don't want to go for any other career route, I just want THIS particular career goal of mine to manifest into reality.
I also seemed to see some Fe in myself, for example, there was once when a coworker yelled at me. I knew I was feeling upset when she yelled at me, but I didn't know how terribly hurt I was until I started breaking down and crying.
I was so surprised by my own reaction. I didn't even know that I was so deeply affected by the way she treated me until I broke down crying.
And also, one of my classmates/acquaintances told me, "You are ok, except that you don't really reveal what you are thinking at times"
But then again, I am not sure whether the above situations that I am describing is correlated with Ni and Fe, I still have lots to learn about these functions.