hello i had unprotected oral sex on sept 2. A mouth later oct 8 i ask the woman about having any STD'S and she said she has never had one. She also stated she had a blood test and tested negative for any sexual transmitted diseases. But i realized a small little red spot on the back of my shaft(could it be a sore???)(not circular) and my skin has been peeling does this mean i might have syphillis??? Also ive had a small sore throat and been tired(i'm an athlete/student) what are chances that i might have caught anything