5 weeks ago i recieved unprotected oral sex, at that same time a started at the GYM trying to lose some weight

Anyway a few days later i was chaifed from the gym and got some infected ingrown hairs around the chaife (according to 2 doctors)

I took 2 doses of 4g Amoxil, and am now using some cortozone cream and daktarin spary, and about to try canistan

Have had std tests, all negative, but now i have a red scrotum and itching between my buttocks, I now have a fair few red like pimples on my inner thighs and 3 on my ground, One was very dark and when i popped it today blood came out. I am also overweight

The last doctor i went to said it was folliculitis, i have also had 3 boils on my buttocks

Does anyone know what this could be, Could this be an std