Hi, I think that while it can be RSD, it first needs to be ruled out that there are OTHER systemic things going on, especialy as there are many things that can be taken care of, and maybe you will have a good treatment for the symptoms. So..just because you have RSD, doesn't have to mean that any additional symptom you have is related to RSD (much as some doctors might like to have things in neat little packages...). So it is important to be tested for endocrine stuff and for metabolic stuff and blood work for all kind of other things to make sure that you don't have anything else treatable going on there. Being in pain all the time can affect your immune system, and then you can get all sorts of buggers hitching a ride into your system. So my recommendation--get a second opinion, see another GI, insist on seeing an endocrinologist, and I hope they figure out what is wrong with you AND know what to do about it.
Annie