Suggest Treatment For Small Patch Of Red Dots On Penis Head

hi, i have a small patch of very small little red dots on the right side of my penis head, i am uncircumsized and 18 years of age both me and my partner have only had a sexual relationship with eachother. A day after i had sex with her in a odd position i got these red dots, they arent sore, they dont have pus but they itch a little bit, they look nothing like blisters though. When i touch them they are a little tender, and recently i have used bar soap on my penis head, to me it does not seem viable for it to be a STD because we have only had sex with eachother