Pleas Help. I Moved To Texas 7 Months Ago And

Pleas help. I moved to Texas 7 months ago and have had skin problems since I came here. To give you some background I came here for rehab for using IV narcotics. A few days into rehab I noticed a spot on my finger that was itchy. By the time I was two weeks in my whole body was itchy but the "rash" looked different depending on what part of my body it was one. In my treatment center I was treated for scabies. After getting out I tried to deal with it and hope it got better but eventually went to a dermatologist who told me I had 3 different types of dermatitis and that it may be stress related. She gave me pills for the itchiness and a cream. That worked for a little under a month. Then it all came back worse. My genitals had been slightly affected before but all of the sudden they had giant red lumps on them. I'm not sexually active, last person I was with was 3 months ago and I used protection. Last person I was with without protection was a year ago. So when these lumps showed up it was back to the doctor. Same meds the dermatologist gave me plus prednisone. Again the prednisone worked but as the taper went down the lumps came back. Also I switched all my detergents and shampoos to hypoallergenic. During all of this my whole body is still itchy but the rashes seem to come and go. I think it's strange that I would have all these skin problems show up at once. Can someone please help me?