You sound like me, I have the same problem although I am a guy. I am sorry that I cant answer your question, but your definitely not crazy. I have an outlet, which I use on the internet at link removed this might work for you, it did for me for a short while.
The problem I face is with ym friends more than anything, feeliung bad when somthing goes on and not being able to stop worrying and thinking about it too the point that everything else in my life stops.(Isn't the best thing when it's your final year at school)
I'll keep an eye on this post, to check other answers you get, to help me also. I know with me, what I worry about and hwat stays in my head is usually the most important aspect of my life.
Good luck in solving this, hopefully it can help me too.