I can really relate to you RamynKing. I've had very similar experiences, and I've lived my life over-reacting emotionally to things without knowing exactly why.
Here is a video describing how to release past negative associations that amplify your emotional responses.
At first to me it looked like a bunch of new age mumbo jumbo, but I tried it anyway because all it cost me was a little time. I was surprised to find it worked pretty well.