Like you I had a negative ANA for long time--recently it was positive, either way doesn't mean you don't have Lupus..I also get the rash worse wehn it gets warm and it can itch..Sensitive to light so much that there are times I litteraly put on two pair of sunglasses..A mans glasses over a womans works great..
I do have to avoid oily foods now but think that due to having gallbaldder removed..
I am on Methotrexate and FOlic acid for the Arhtitis and a new drug called Savella for the Firbormyalgia..He hasn't helped with pain but it has given me more energy so that is a huge plus..
Unfortuantely when you get into the autoimmune stuff-nothing ever makes too much sense..It's hard for the docs and for us the pts. because we have soo much going on they ahve to rule out this and that..
My doc says if it looks like a duck and quacks like a duck then it's probaly a duck so you treat it like a duck..His specialty is Rheumatology and he is a true auhority on FIbro/Lups etc..