Hi, I'm 23 and found a small pimple/bump on my penis 2 days back. Now it is still there and little paining. There is no blooding or anything yet. I am really worried now. Had sex few times always safe one. Last time was around 4 months ago. Is it STD or normal thing? Any medicine or cure to protect it? I want to remove it asap. Please reply if u have any suggestions. Little afraid to go doctor.