Few weeks ago I had protected anal sex with a guy of unknown HIV status. I was the top. From start I felt like I was close to ejaculate but I lasted about 10 minutes. After orgasm I pulled out, condom was intact but couldn't see any semen in the tip. Any chance I got any risk during this event? I rechecked the condom after sex looking for anything wrong (I was so nervous) blowing air in it and no holes or tears. I can't stop thinking something may have happened during sex. That never happened to me before. Is there any way I could have climaxed without ejaculating? Please help ease my anxiety...