I’ve had these recurring spots for about a year and a half now on my penis and I don’t know what to

Around a year and a half ago I had unprotected sex with a girl. A few weeks after i notice loads of red spots appear and naturally i thought id caught something from her. I went and got tested a while after (only for urine) and it came back clear. I had showed the sexual health nurse the spot that had formed and she said it was nothing to worry about. After all this the spots continued to come ago. They start small and them get bigger until they eventually burst over a period of a few months. I think theyre mollescum but i went to the doctor and she doesnt think it is. Its really made me anxious about my body so id be greatful l for any advice on what it is.

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