HELP blisters appeared and I’m unsure of there cause

Last time I had unprotected sex was around 7 weeks ago, both these blisters have appeared in the last few days alongside a small cut around 4 weeks ago. Does anyone know what the cause could be?
first image-inside my groin
second image-on my bum

does it hurt alittle bit, i had the same thing like a week ago

hi, these are not sore at all, what was the cause of your blisters?