I noticed four small bumps on the top of the head of my penis. Could it be genital warts

I sexually active and always use a condom for intercourse. The bumps are very small (less than a milimeter) and are not discolored. They also are not clustered, fluid filled, or uncomfortable in any way. I went and got a full STD testing panel which came back negitive to all. They bumps went away after a little over a week with no discharge or scabbing
Could it still be genital warts (HPV)