None of the things you describe sounds like warts, molluscum, herpes, or any other STD. But you will never know for sure by online research or questioning a forum like this. Your only option is to see a health care provider. Your local health department STD clinic would be a good choice for expert, confidential care.
Virtually no STD ever causes outwardly visible disease that people could recognize. (How many times in your life have you met someone and said "Aha! He's got genital herpes"? Or warts, chlamydia, syphilis, or anything esle. There was a time, generations ago, when advanced syphilis was rampant and sometimes there were telltale signs. (Remember Phantom of the Opera? In the original story, the reason for the mask, and for the phantom's ostracism, was syphilis.) In the modern era, Kaposi's sarcoma had this dubious distinction in AIDS, especially if there were lesions on the face. But with modern treatment even that is largely a thing of the past in western countries.
Good luck-- HHH, MD
I no expert. But i suspect fordyce spots if you only notice them during an erection. You probably have a cheek bight in your mouth because you probably bit your cheek. Overall sounds like a case of paranoia to me - but see what the doc thinks.