Omg i think i have ?

last night my girlfriend came over and she said she was very horny so kinda walked me to my room and then we started flirting and such and we were talking dirty and stuff, then she ripped down my pants as i cover my face in shame as i begin to wonder wtf is going on and then i had a ***** so she started jerkin it and then starting putting it in her mouth and her head was moving up and down then after 5 or 10 minutes she stopped and we started talking dirty again then she had to go home and that was the end of it. so now my is itching. someone help!