hi,little worried here i was with a couple the other night,im a 50 yo male,we had protected sex(condom)vaginal sex from her,and oral sex from both,she also licked my anus,as stated,i had a condom on,but it was half way down when i noticed it,(it did not break or come off)i finished off by masterbation using a lube,i got home pee"d took a shower and got to worrying about it,i took 500 mg of cipro that night and 250 mg levaquin,1 each day(total 500mg)what are my chances of contracting some std?hope someone can answer this,pretty scared and everyone here seem to know what they are talking about,thanks all