I know exactly what you are talking about and many of the stories on this board here could have been written by me. When I first discovered this site I was so relieved and didn't actually believe that people are having the same type of problem.
Unfortunately so far I haven't made any progress in finding a solution to this - sorry I can't offer any more advice. Have you done anything in regards to find the cause of your problem? Where does the smell coming from? Did you ever see a doctor? If you ever want just write about your experiences or vent feel free to e-mail me skim_tree@yahoo.com - like I said I can relate very much to what you are saying especially the social isolation part, but don't give up, you are not alone!!! S.