Alright, over the last year I have received oral sex (*******) from 5 csw (escorts). All of them have been with a condom, never any breakage. My last encounter was about 13 days ago and I am having this itch at the tip top of my penis. There is no discharge or any rash/discoloration, bumps, etc. From my encounters what are the chances I contracted an STI, and could this itch be one? Thanks