Do get help. I know so well what you are talking about from my own youth-----everything is "off", it is almost as if the world is off its axis, the sun doesn't set "right", the solid earth is untrustworthy, you no longer have the confidence, you question ----and you just hang on for dear life.
I waited too long---(I didn't think anyone could help me, and I was very afraid to say anything...toughing it out was not the best decision I ever made...)
But, for all that, life has turned out to be full of Real Worth...painful at times, but worth it, and better than it was...
These things happen, sometimes we can know why, sometimes not, we want to explain it, but we have to open up and live where we are in order to move on...