I Have Been Taking Cell Cept For Almost Five Months

I have been taking cell cept for almost five months now. I have since acquired a skin rash that is horrible.
It is very uncomfortable, the rash is spotty, itchy, and it leaves dark spots on my skin. I am a 57 year old black female, who has had minor skin problems. I was wondering if this could be from the medication. It does not respond to the predisone that was prescribed. I have been diagnosed with an autoimmune with me having intestisal lung disease