I feel your pain…I’ve been there. I was diagnosed itch Rheumatoid arthritis when I was 49, after many years of doctors telling me I had nothing wrong with me.
You are correct in stating that you know when something is not right with your body.
I speak only from my own experience, with my own body , when I say, I too had similar conditions.
What I have discovered, is that an autoimmune condition can change and become more complicated with age. I am now 76 years old and suffer from many additional autoimmune conditions. In addition to RA, I have Lupus (diagnosed in 2019), Fibromyalgia (2020), Atopic dermatitis /Eczema (2023). Although, Evzema is not considered an autoimmune condition, it often accompanies one. I suffer from dry eyes, dry mouth (Sturgeons Disease), and beginning stages of Dupuytrans Contracture.
Unfortunately, the butterfly rash is a typical sign of Lupus.
In my opinion only, I firmly believe you need a good Rheumatologist who will listen to you and work with you to improve your quality of life. There are many issues involved and some of them become as frustrated as you are and develope an indifference to your concerns…learn as much as you can about autoimmune disease so you can inform your doctors on signs and symptoms…my eczema started with my legs covered in bumps and uncontrolled itching. I was told I had a fungus infection, put on three different medications that did little to nothing before a dermotologist quickly landed on Atopic Dermatitis/Eczama and still was told to buy over-the-counter creams which did not control the condition which by then started on my face, neck, under my breasts, my feet, etc…
Finally a physician’s assistant prescribed Clobetasol Propionate Cream USP, 0.05% (Emollient).
Good luck but stay informed and insist on better care.