Forgot to mention I got the 10 something panel test where I tested for Chlamydia, HIV, and more I can’t think of at the moment and all came back negative as well.
I'm not doctor, but what you describe as bumps, are they flesh colored? Since once upon a time I had the same worry, I'd recommend you google Fordyce spots or Pearly Penile Papules. Hope it helps. Sitting around here hoping an expert answers my question, so figured i'd try to help, too.