I Recently Have Had Symptoms Of A UTI And I'm

I recently have had symptoms of a UTI and I'm 17 and once I started eating a lot yogurt and drinking water and cranberry juice the pain has slowly gone away it still burns a little but my big concern is the two little bumps with scabs that have popped up on the shaft of my penis. A few weeks ago my GF had a cold sore and performed oral sex to me and idk if this is related or not but it's scaring me. It can't be an STD bc we both lost our virginities together.