Could My Persistent Jock Itch And Red, Itchy Rash Be An Allergic Reaction To Crystal Meth Use?

Hello. So about a month ago I indulged in the use of crystal meth. Don’t do it all the time. Well I developed a rash or what seems to be jock itch. I have a red scrotum. Sometimes burning, itchy, scaly feeling. I went to two doctors and the tested me for STD both times came back negative. I’ve used prescribed anifungal snd over the counter, gold bond medicated powder along with the medicated lotion and it still is here. And it’s in my inner thighs and the cleft and crack off my butt. I’m just wondering if my body is having an allergic reaction to the drug.