The comments from the doctors stating that you have a psychosis for parasites has me furious. Many people, as well as doctors, label things they don't understand as mental issues. I can't tell you how many told me I was imaging the headache I get just walking by the tire dept in a store or how I feel when exposed to cigarette smoke. My rubber allergy results are in black and white now for others to see, testing as high as the test goes, so much so that the off gassing let alone contact raises my histamine levels. Like you and others I have had symptoms which confused many doctors and their labeling us neurotic is an easy out. You are on the right track to getting this figured out, just like I did (yes, I had physical causes for my symptoms as you do to). I found doctors that believed me and helped me. You have many of us that hope you learn something with your upcoming appointment and I don't want to pressure you but many feel invested in your life now so if you are up to it share what you learn.
Sorry to say, I don't have an upcoming appointment except with my family doctor. She doesn't know much about skin disorders or parasites, but she cares, listens, and referred me to my first dermatologist two years ago. I am treating myself right now by following a protocol I read in a book, on how this new friend of mine helped himself with a parasite problem he had for years in the 90s and how he got free of them (his particular nightmare was the Collembolo or sometimes called Springtails). The book is his history with this parasite and how many things he tried to finally figure it out. It took him many many years to find an answer. He has helped many people so I hope I'm on the right track. His book is called, "How To Get Your Life Back from Morgellons and Other Skin Parasites," by Richard Kuhns.
I've just started a special diet this week and will keep you updated. If anyone knows of any scientist who is interested in my case, please let me know. In the meantime, in not giving up, although sometimes I want to.