Why do I get such awful PMT?? What is wrong with me?

I understand what you're going through completely, in the last year my PMT has grown steadily worse, a week before my period, like you, I suffer terribly from it. I'm usually a very positive, happy person, when I have PMT it's like I change into a monster, I'm depressed, sad, lonely, angry, frustrated, I feel unloved and ugly. I'm in a loving, commited relationship with a guy who makes me very happy, when I suffer from PMT that all changes, I have trust issues (even though I have no reason to), I feel as if he doesn't really love me or appreciate me and this makes me lash out at him sometimes. I just feel like crying and sometimes wish I was dead it's that bad, I'm also aware it's irrational but I can't stop it no matter what, I just desperatley want it to change, I can't stand the person I change into when I have PMT, a pathetic, depressed person with no self esteem. The worst thing to do is to sit on your own and cry about it, beleive me, I know how horrible it can be, what you need to do is distract yourself from your feelings, I ususally watch a movie, clean, go out with my friends, do some exercise, anything that will stop me thinking about stuff that might upset me. I really hope that helps and that you know there are other people who suffer from it, you're not alone :)