I have extreme anger and aggression problems?

I'm 21 and I've had problems with anger and rage for many years but they're only getting worse. It's to the point where my anger runs my life, and my days are far from being as productive as they need to be. I'm in college and my grades suffer because of it, as does my social life which really doesn't exist. I've seen several therapists since I was 15 but it hasn't helped at all. I don't know if its my fault or theirs but no good has come from it. The worst part is that nearly every little thing that goes wrong or not how I want it to sets me off. I get a very intense feeling throughout my body and my legs and arms essentially go numb. I feel a very strong urge to hit someone or something (I usually end up punching a wall) and it will not go away until I release my frustration physically. I try riding it out but the feeling only intensifies until I start to feel a sense of panic and usually have to curl up in a ball until the feeling subsides (don't know why but it helps dull the feelings). I also live with a dog and although I don't hit him or yell at him I feel bad that he has to live around such a stressed and frustrated person since I know he must pick up on those feelings. My life has come to a standstill because of these feelings that won't go away. Any suggestions? I'm sure I've tried everything from medication to counting to yoga but maybe there's something I haven't tried.