After A Day Of A Lot Of Masturbation And Then

After a day of a lot of masturbation and then intercourse with a girl friend I noticed the next day I have 4 liquid filled blisters on my penile shaft one of which is on the head. I'm stressed its herpes but am really leaning toward friction blisters on account that there was a lot of rubbing going on. Plus I strive to wear condoms with my partners. how common are friction blisters?