Ok, ive had jock itch for a long time now, at first it wasnt to bad, but then it started to spread fast (i first got it when I was 16) anyway I had went to the doctor and I got some cream, 'taro' is what it wad called, in a red and white tube, it cleared it up mostly, but ever since then ive gotten it back again and again, I recently got an infection on my inner thigh from it I believe, and had to have surgury to have it draind, it cleared up completely from all the antibiotics I had pumped into me while I was in the hospital, but its recently come back, ive been using goldbond antifungal footpower to get rid of it, and its seemed to work before, but now it dosnt seemt o do anything but slowen the process of its growing, its currntly all over my left thigh (im a tad overweight so my legs are a little flabby at the thighs btw) and im a large person so I generate alot of body heat,i tend to use rubbing alcohol to clean myself before I go to bed, then dry it, and reapply the antifungal powder, but it still never goes away anymore, it dosnt itch, it dosnt doa nything now but make my skin dry and flakey with a small red outline around the infected areas on my legs

what should I do? The doctor only tells me to clean it and keep it dry, but I have been doing that for atl east 3 years now, im 19 now and turning 20 next month, this is driving me insane and is completely destroying my sex life because my gf is easily succeptible to yeast infections and I was warned that if I were to have unprotected sex with my girlfriend she would most likey get one that would require perscription grade medicine, please help, im at my wits end with this :(