I would say these are my two major symptoms. I started suffering from acute indigestion in late summer 2018 and the GP prescribed Omeprazole. Only a few weeks later my hands and lower arms became swollen, red and painful. As luck would have it the same GP who happened to have a special interest in rheumatology and dermatology, immediately suspected systemic sclerosis and referred me to specialists in both fields. It was pure chance that this happened as I know other people and my own relatives have had a 2-3 year wait for diagnosis of auto immune conditions (and I realise many people wait even longer). After two gastroscopies, gut biopsies, numerous blood tests (largely inconclusive) and finally a skin biopsy, I was diagnosed with scleroderma in June 2019. I was later discharged from dermatology but still have regular check ups from my rheumatologist, plus echocardiograms and lung function tests (although waits for these are variable!!). My gut issues (reflux, bowel frequency etc.) are manageable at the moment but I have to be careful - I am currently on mycophenolate, hydroxychloroquine, esomeprazole and antacid, plus eye drops for dry eyes.
I think GPs require more education about this and other auto immune conditions. They can cause so much distress for so many people. Even though they are relatively rare there are still a lot of people suffering acute anxiety waiting for a conclusive diagnosis for mysterious symptoms.