have a few patches of smooth red skin on my penis. There are no bumps or sores. My last time having sex was around 2 and a half weeks ago. I also was put on amoxocillin for a week around the same time i last had sex. initally the skin was very very dry and flakey so i began using clotrimazole ointment 3 times a day in case it was a yeast infection. It is now very irritated red skin and still slightly dry. is this an STD? Jock itch? Yeast infection? I cannot get tested until next week and i am very scared. Thank you