I'm sorry to hear that your bf cheated on you. But, i doubt it would be from a used condom, cuz std's need a warm place to survive. But if he was cheating on you, you probably got it from him, and to me that bump sounds like a STD that I heard about in health just a few weeks ago. Not sure wich one, but you should definatly have it checked out, just to be on the safe side.
never had an std test and i was just with 1 partner my whole life, im thinking it may be from that, but not an std thank you so much for your response i dont know what i was thinking at that time.,......
I seriously doubt that the condom could have an active sexually transmitted virus or bacteria. it is possible that you already had an STD or you irritated yourself by using a dirty condom. When was your last STD test? You should go to the doctor and get the bump cultured and have an STD panel including HIV and Herpes.