Johnny:
I can't say with certainty without seeing you, of course, but the rash in the groin certainly sounds like folliculitis ("blocked" sweat follicles.) These would be likely to appear in chafed areas in a hot climate.
I don't know why the doctor prescribed genital wart medication. It seems unlikely that warts would appear on both the penis and in the innner thighs. I suggest that you get another opinion on this score, especially since the wart medicine doesn't seem to have worked.
The doctor you consult can also shed light on the relationship, if any, between what you have and what the girl you had sex with had.
In the meantime, just leave all the spots alone until you can be examined.
Best.
Dr. Rockoff