Is it allergy or just coincidence??

It's the second time now...I'm back from his place, we had intense sex night and in the morning...but then I notice some little red spots on my body, and it's always near my breast and my belly...dont know what it is honestly and it creeps me out...Am I allergic to him or something else from his place?? Or is it just my body and maybe a little of acne...also i've never really had acne in my life fortunately so that's weird...

Anyone knows what it could be??