I Just Recently Became Aware That I May Have Lupus.

I just recently became aware that I may have lupus. I have rheumatoid arthritis. For several months I have something similar to the butterfly rash, but didn't associate it with lupus. Lately my joint pain and fatigue ha been worse and I developed a fine rash on my face and started asking questions. Someone mentioned lupus and from what I have read as I start my study, I think I may fit several of the symptions. What do I need to do next?