I've been seeing an ex as her rebound, the second time we had sex, the condom was on halfway and things were going well. I made sure to check during that the head was covered. But when I was pulling out, the condom slipped off. It was left inside her and I could see just the tip which I used to pull it out. It didn't break.
She just came out of a bad relationship where she claims her ex cheated on her with about 5 girls. He claims he used a condom she said but who knows? I asked about STIs and she said I have nothing to worry about. I don't know if I should be. Help, how high is my risk?