PLEASE HELP! - What should I REALLY do for the best?

I'm a 28 year old Male, very unfit, I suffer daily panic attacks, severe hypervigilance / hyperarousal to the point where I cannot go to any shops / supermarkets or talk to people on a day-to-day basis. I eat ONLY Carbohydrates (two loaves of Bread a day, rice, pasta, mashed potato), because I have Emetophobia (A fear of Vomiting.) I have also started sleeping in my clothes. I don't want to look after myself at all - but underneath it all it actually doesn't feel like Clinical Depression. (There is no low mood anymore - just hyperexcitability and HIGH Agitation.) I just cannot rest / relax AT ALL! I talk very fast. It's definitely more of a Stress / Anxiety response that I'm getting. Underneath my arms is always completely saturated 24 hours a day! the ambualce has been out twice due to severe chest pains that spread to my arms and jaw. My blood tests have all come back as normal. My Doctor has prescribed me Trazodone (Molipaxin), and he wants me to gradually increase the dosage from a very low dose to an optimum dose, but I'm worried about the side effects (..specifically Nausea, Vomiting and Diarrhea.) so haven't started taking it yet. I want to know if it's safe, and whether the benefits are better than the long-term risks. I know how it works through Wiki and other medication sites but, I'm still unsure as to whether I want to start it or not. What other options do I have to be able to at least 'RELAX'. It really has gone past the Nervous Exhaustion / Mental Breakdown stage. This feels to me like full-on Adrenal Burnout!, (if the condition actually exists.) I've done all the crying and rage etc. I know it's not Psychosis or Schizophrenia etc because I still have an insight into it all, and know consciously that it is all irrational. Please help - any input onto some kind of daily plan for me would greatly help. :)