I must have been asleep at the switch yesterday. Here are some leads I should have given you: first, the STICKY POSTS at the top of the thread list. One is on Lupus test results. The others contain the ACR criteria for lupus; a list of "alternative criteria"; and a list of symptoms/criteria for antiphospholipid syndrome, a blood clotting disorder also seen in some lupus patients.
Two other very good sources would be hardcovers found in most libraries & bookstores: one by Dr. Daniel Wallace, and several by Dr. Robert Lahita. These men are two of the top U.S. rheumatologists. Perhaps scanning these materials can help you form some very precise questions for your GP, dermie, endocrinologist [was there one for your thyroid issues?], etc.
As far as lichen planus goes, I don't know its correlation to lupus (if any), let alone to other autoimmune disorders. Maybe you could do some extra searching on that, also looking for the so-called "differential diagnoses" to LP (things that might look like it but arent). Have you asked your dermie pointblank, especially now that other problems are occurring, in what broader disorders it also occurs? (And if I find anything interesting, I'll post same.) Of course the caveat on all skin problems is, Did the dr. Dx it correctly? I don't say that to be mean-spirited, rather that skin problems can be very tough. e.g., I had years of annular lesions that were called all sorts of things by about 5 dermies; turns out they were absolutely classic SCLE annular lesions, all along.
Also, see the tab labelled RESOURCES above? This Board has links straight to mainstream info on a whole raft of diseases & conditions.
As far as hypochondria goes... I think a *rational person* would start to think something was fundamentally wrong if seemingly unrelated things kept going wrong over many years. I certainly was in that boat, too. I was Dx'ed at age 47-1/2 after a lifetime of episodic problems. I was at my wits end, as none of my drs. even BREATHED what they were looking for. It was the hospital radiologist who let the cat out of the bag, when he was doing a kidney function test on me. And I'm STILL very angry that no one levelled with me, as my problems did great harm to my childbearing years, career, and marriage. I consider myself a very logical person who could have easily handled suspicion---not good at all, though, with snarkniness or paternalism.
Last, have you ever seen a rheumatologist?
Hang in there! We'll all watch for more posts from you, OK? Bye for now, from Vee