You have what's called Multiple Chemical Sensitivity. Go to this link for an indepth look at this disorder. www.ilru.org/ilnet/files/bookshelf/mcs/mcs1.html
Your story sounds just like mine. I also belong to a support group on MCS that would be very helpful to you. You will find them at the following link: http://groups.yahoo.com/group/MCS-CI-Hope/
But please read the article first. It is a waste of time to visit all these doctors. The problem lies in a sensitivity to all the toxins in your environment (pesticides, perfume, laundry softner, prepared foods, etc.)