Recurring pimples on crotch area

For about 2 months my girlfriend and I have been having unprotected sex. Since then on three occasions I've had pimples show up on the crotch area above my penis. The first time there were three about 1/2 an inch apart from each other. One of which I popped and the other two healed on their own. The next time there was one and this most recent time there was one. This is all over a 1.5 to 2 month period. They last about 1.5 weeks on average. There has never been one on my penis or the genitals. Only on the crtotch area above my penis where there is pubic hair. They almost always have a hair sticking out of the center of them. This most recent time I pulled the hair out and some white stuff came out. Now it is healing. It is circular and pink with a bright red spot where i pulled the hair out. There have never been any blisters or anything cauliflower like bursts. Like i said they don't burst open unless i squeze it hard. Also when i do touch it, you can tell that there is something very hard underneath the skin. Not sure if this is recurring bug bites (i have had bed bugs), an STD (I hope to god not), or just pimples. I am trying to see a doctor in NYC but getting appointments here takes forever. Can anyone advise on what this might be and how worried i should be about this being at STD. Thank you.