I have had sex with my girlfriend a few times now, and unprotected sex has been the way were doing it all the time, but last weekend for the first tine after having sex the next morning i found little red spots on my penile head, it does burn or itch , ive looked up on sights and it says it could be friction or irritation after having sex, it was quite rough sex we had that night and not a lot of lubrication was used! Is this the cause of my problen?