Why is that?..

This year is beginning to bug me. all of my classes are annoying, as well as other committments. Why is that everytime I get ready to do something I want..something BAD happens. It seems as though nothing is ever in my favor. I'm trying to keep it together but lately, it seems as though nothing is going right. I just don't understand why I'm always pissed off and never happy. It seems as though whatever it is i'm going through is getting the best of me. HELP!