Last Wednesday I gave very brief oral sex to an escort I have no real symptoms, I think, but I feel sick to my stomach with guilt, and when I think about it too much I get a sharp pain in my penis my doctor said I am at low risk. Is this true? Is my mind just playing tricks on me? If I did contract an STD in my mouth, could it travel to my penis?should I get tested, write it off, stop reading about symptoms?- Concerned young man.