Lester Said:

I don't understand things?

We Answered:

It's possible that you may have developed a social phobia in relation to this traumatic incident. When you are with people, are there things you find yourself doing unconsciously which would bring the end of your interaction? If this is the case, my only suggestion would be to get out and interact with people, not allowing yourself to have an easy escape. In time your stress will decrease, and your peculiar symptoms will diminish with it.

But I can't say that's necessarily what you're describing.