What Causes Rashes On Face Along With Pain In Knees, Neck And Shoulders?

I broke out with a rash on my face and went to see my dermatologist. She thinks it is lupus and ordered blood work. She asked me a lot about symptoms and I do geshest frequent mouth ulcers, joint pain in my knees, neck and shoulders for no unexplained reasons. I also catch viral infections easily. Right now, I am suffering from a stomach virus that my son had. I didn t even touch or get to close to him but I have it. Lastly, I am diagnosed with generalized depression disorder and anxiety. I get down alot because stuff is always wrong with me and I don t know why. If, this is the case, it would answer why stuff is always wrong with me. For example, I had bunion surgery in December and went for a follow-up and found out that the screw went through the bone. This made no sense to me because I took vitamin D. However, I read that lupus could also effect your bones. Also, last month I had an unexplained rash on my arms and thighs. The bumps were small and red with a distinct look in the center. Thank you, Alaisha