What Is The Small Red Dot On My Penis?

hey i have a very small red dot on my pines i had sex with my a girl but its a protected sex !!! i want 2 doctor he say its nothing like std or any other thing after few day i want 2 doctor agan to ask i say there is a other small dot also he had give my some cream then after appling that cream i got some itching plz tell me what is it