I have only had sex once and we used protection. But what are these bumps?

Hi! I'm posting here before I go to the doctor (I will be going in the next few days) because I'm super scared. I had sex with my then girlfriend a year ago. It was my first time and we used protection. I became paranoid and decided to get tested 3 months later. The doctor said she would call if anything was wrong with me, but I cleared and never got the call. After having sex I couldn't get rid of my paranoia and I kept thinking that I had contracted something but it had not shown up yet. Fast foward a few months and I noticed a small bump. It didn't look like anything I had seen before. I made my research and compared pictures. It became a bit red a few days later and it seemed to have a tip. I ended up squeezing it and something hard (a bit waxy) came out. It healed and disappeared. That was not the end of it as similar bumps came present in my public area several weeks/months later. They all seemed spread out. I got to the idea that maybe it had to do with the shaving of the public area, so I stopped shaving. They disappeared for the most part...until recently. I squeezed one of them and it seemed to be healing however, I might have caused an infection from the looks of it. What could these bumps be? I'd like to add that they do not feel "squishy" or filled with fluid, but they have a semi hard feel to them. Is it an std?

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