i had condom sex with girl few days ago night,she might hiv positive,.i know condom sex post no risks,but I'm worry about condom slip off,..i wear the condom then we having sex,i'm take a new condom from my friend,so i not so sure the size about the condom,i just wear it and i have sex with the girl..we sex about 10-20 minute ,we keep change position and skill,the last action and skill is she at top on me...i mean she sitting on me,i'm sleeping and she sit on my penis sex until i came..Then after i came i didnt take out my penis direct,she was still sitting me and a while ago i just hold the condom and pull out,..is that possible during change position and skill my condom have slip off and i don know? because it was few days ago,so i'm not so remenber ,but what i remenber is,after i ejaculation,the condom still inside my penis,because i hold the end of condom and pull it out,but maybe i have came and didn't pull out directly,so my penis become small and the condom loss to middle of my penis...anyway Is this any hiv risks for me?i'm worry about changing my condom slip off during changing sex position and skill...Please look carefully and answer me..Thanks and god bless you!please...!