Hi there just got back from an appt with a rheumatologist about my raynauds syndrome and he mentioned that I've tested positive for antibodies in my blood. He looked back at my notes and he said sometimes my blood tests were negative and sometime positive. I asked could it be my thyroid causing it,he said maybe but didn't seem too worried. Should I be looking into this? I am on 125 mcg of thyroxine and I also have pretty severe fibromyalgia.