Urgh. How rough. You're too young to have chronic disease. ☹
My husband has prostate cancer, slow growing, and they're not advising treatment at the moment. It might never really do anything - sometimes this type of cancer just sits there.
So in the absence of any better ideas, we're trying a raw vegan diet to see if we can shrink it. It's been a year. His blood tests show small improvements, but whether that really means anything remains to be seen. He has an MRI soon.
I hope you find something that helps you. Good to hear the ulcers seem to be getting under control a bit more.
Might sound stupid, but I was wondering if omega 3 might help with the joint issues. Just did a quick check. Maybe. I guess you've already found this website? https://www.lupus.org/news/study-shows-omega3-fatty-acid-supplementation-linked-to-reduced-inflammation-and-flaring-in