Could my bf have caused this rash?

I had sex last night with my boyfriend, and afterwards we were messing around and he jokingly put his dick on my breasts and rubbed it for like a minute. I went home and my chest started to feel itchy, now it's morning and i've woken up with a very itchy chest and it's red and i had little red dots all... show more I had sex last night with my boyfriend, and afterwards we were messing around and he jokingly put his dick on my breasts and rubbed it for like a minute. I went home and my chest started to feel itchy, now it's morning and i've woken up with a very itchy chest and it's red and i had little red dots all over my breasts???? What the ****
Update: Can confirm it is not herpes.
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