There bumps just popped up last night

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So I am not sure what this is. It is scaring the crap out of me. I had three red rash spots along the side of the my penis head the night before. I used some 1% Terbinafine Hydrochloride on it that night. I woke up and the area was irritated and was a little uncomfortable. I showered and decided to use some Mupirocin Ointment usp 2%. After a couple of hours the rash bumps became raised. I haven't had sex in two months. I've had 2 STD checks done in the last 9 months and all negative no new partners. 2 weeks ago I had a really bad rash on my penis glan and went to the emergency room. I was swabbed and that also came back negative. I was told it could be a bacterial infection. This is where I got the Murpirocin from. It cleared up in two weeks. Now this is happening. Can anyone help?

It sounds like there is something present that is causing this issue and this may have been present for some time.
The Murpirocin has helped, no doubt - but it may not be dealing with the underlying issue: I suggest you get checked what is actually going on at a sexual health or a GU medicine service such as a GUM Clinic if you are in the UK