earlier today my fiance and i had unprotected sex,now which we always do considering we have been monogomous (at least on my part) for 5 1/2 years, we also have children together. right afterwards a small outbreak of red blotches, somewhat pimple like but more of rash looking had appeard on the very tip of his head and all around the upper shaft(he is circumcised) they were not there before we had sex, unless they were just not red. i am in constant wonderment now if this could be an std meaning he has been unfaithful, or am just over reacting and it could easily be a rash of some sort?please help.