Diagnosed with pre-lupus

I am diagnosed with "pre-lupus", and am being treated for it, basically my blood work shows I have it, but I have no symptoms of it, besides a rash I sometimes get. This summer I have got three yeast infections right after each other. I have got yeast infection under my arm pits as well. During all this my face has got a rash, very itchy and red. It has become extremely dry out of nowhere including other parts of my body. My dermatologist also believes i have seborrheic dermatitis. I have very bad dandruff with almost like scales on my head no matter what i do, it is always there. My face has also become more sensitive recently to certain products, and out of nowhere gets itchy and red randomly. Would this be some sort of yeast over growth in my body? And this is my body reacting? I feel as if my doctors think I am crazy, I am a healthy (well besides this) 20 year old college student. And i just feel gross everyday because of this I just want it gone.