please help?

for the last 3 years, i have lost all control of my mind. I worry constantly, so much, that I can't even really think about anything else except my worries, which sometimes, seem 'crazy'..."what does my boss think of that phone call I just made", "is my friend mad at me?" "did i make a fool of myself when I did that?" "was that person at the grocery store staring at me because they know something?, think something?", and all of these thing bother me for days on end, I will lose sleep.. not just wander though my mind for 5 minutes...someone will say one little word in a way that seems 'strange' to me, and i'm immediantly asking "did I do something?" ...so much, that it has begun to control my life. I have ruined 90% of my relationships in the last 2 years because of this...romantic as well as friendships.. Somedays, I am just so, worried (?), that I shake, badly...it's gotten so bad that co-workers have made jokes about me having parkinsons disease.. I can't sleep, and rarely can I even keep my attention focused on one thing for longer than an hour...if even half an hour... In the last 6 months, I have gotten to the point that I drink so much that I just pass out at least 4 days a week because there is no other way I can ease my mind...and no, I am not/was never an alcoholic, I rarely even ever drank up until, like stated, about 6 months ago, but it is the only way that I have been able to subside my mind... is this anxiety? I do not like going to doctors, and not really sure where to turn at this point..thought maybe this could help point me in the right direction..Hopefully someone can help...