suggestions being away from home/work issue

I have a few issues here, I will try and keep it short. Im away from my family right now for work and I am under such stress my behavior issues have been acting up. I have had severe social anxiety for about 4 years and my current job has benefits that will pay for me to see a professional. Thing is I have been under such stress with my work my mental state has been decreasing for the last 3 weeks. My anxiety has gotten so bad I have had to stop drinking coffee in the morning bacause I found I was getting so on edge/angry at people. I get so wound up at work that I found im on such an edge that I just feel like phoning up my boss, telling him I quit, and driving home 150 miles per hour. I also recently have broke a few of my belongings, and punched my car hood. With all this stress I have been under, plus the anxiety I lag around everyday, I feel like im tempted to just pack up and go home, but I know my benefits will kick in in no time and I will be able to see a professional. Today I was so stressed that I thought I was going to go crazy that I had to go and buy a beer before my last job so I could calm down. never in my life have I drank on the job, or had a probelm with alcohol but lately I have been picking up booze when I get home more and more. I just think with me being alone at work, and my mind racing 100 miles an hour, I just get myself wound up over nothing. I always feel like im going to snap and like end up in a mental institution or something. I never feel like I want to injure/kill anyone, I just want to get that point across as well. I work for a large company, and its really not that bad of a job, it just seems like I HAVE to quit, I cant handle it. People always think im weak cause I cant stick to a job, its just that the stress gets so bad that I get sick I start to drink alot, and I feel my mental state weakens at any job after about 6 months. I used to run ALOT to avoid anxiety but I find im absolutely exhausted when I get home I cant even do that. Should I just quit my job, sell my car and pay to see a professional? Or should I stick with my job and wait for my benefits? thanks ALOT!

Stumpy_80, maybe it would help if you had reminders of home with you at work. You could call someone who usually calms you down during break too. Try to think about the choice you want to make for a few days and think about the future as well.