I am a 59-year-old heterosexual married man. About one week ago, I had my first and only sexual encounter outside my marriage. I deeply regret it and have never done anything like this before, which is why I am very anxious.

The encounter was with a 52-year-old woman. We had unprotected vaginal intercourse, and she also performed oral sex on me. I did not ejaculate. There was no anal sex. I have had no symptoms (no discharge, sores, rash, burning with urination, or fever).

Based on this one-time exposure:

1. What is my realistic risk of acquiring HIV, gonorrhea, chlamydia, syphilis, herpes, hepatitis B, hepatitis C, and trichomoniasis?
2. Does receiving oral sex change my HIV risk in any meaningful way?
3. Which STI tests do you recommend, and at what time points, to confidently rule out infection?
4. If my tests are negative at the recommended times, can I consider this event behind me and move on?
5. If possible, could you describe my risk using a real-life metaphor or analogy? I find it much easier to understand probabilities that way.

Thank you for your time and expertise.