Yeah I know what you mean I started off with endometriosis which not everyone believes to be autoimmune then I developed PTC which no one really understands but since my case seems to be very closely related to my lupus which was diagnosed five years later I believe it is autoimmune as well, then I developed hypothyroidisim, then lupus, then APS. Scared to think of what is next...
HUGS

Yes, a functional Dr did some tests and found cadmium, antimony, arsenic in my body. Then I was exposed to extreme black mold in a living situation. We finally moved but by that time I had developed a bit if disease. Later this year tests came back from the internist. APS, Rheumatoid Arthritis, Sjogren's and an antibody she doesn't seem interested in investigating but says could be cancer but she believes is autoimmune related. "Anti-voltage gated potassium channel antibody. My research showed things having to do with inflammation of the brain. Right now dealing with fullness, numbness on the leftside of my face, neck, throat. Sharp pain in the left side if my abdomen. It changes often. Most think I imagine it.

Yes here too! Started with myasthenia gravis 1986. I been feeling bad for about 5 yrs now on top of 28 years of the myasthenia. Finally I came up in the bloodwork. Lupus, sogrens, lymphedema, possibly RA, got a rheumatologist working on it now, something missing in my blood, I can't remember exactly the name, but it causes clots, dvt , pe, got 3 of them, almost lost me with the 1st one, it followed a central line removal. etc. Also hypo thyroid
And during the testing, a colonoscopy brought out the colon cancer level 3. They immediately well, in a month, did another colonoscopy to do a reaction and removed enough to bring it down to a level 2.
Oh well, the autoimmune keep on coming. This has a name that it has just been discovered. Called polyautoimunology or multiple around syndrome and is on the rise as technology becomes more effective. Good Luck Friends