4/5 months test reliable

Hello everybody, I had unprotected sex with a unknown girl, 4 months later I tested negative in london with a rapid test, at 21 weeks (4 1/2  months) I tested negative with an ELISA test always in a London hospital. I did not have sex with my wife since as I told her, she has forgiven me and now we want to have a baby. She is negative. Can I consider the results 100% reliable, am I negative and I can try to have the baby or is it better to wait an other test at 6 months? Thank you

[Teak]

If 3 months is conclusive then any following months would be conclusive. There are no 6 month waiting periods.

[b1020]

Thank you Teak, so re this expsure I'm negative as my tests have been done after 3 months. Great I don't know why somebody told me 6 months. Many thanks indeed

[b1020]

Just please one last message to confirm my 4/5 months tests are CONCLUSIVE as I had this misunformation about 6 at my GP.

[Teak]

Teak  42 minutes
. If 3 months is conclusive then any following months would be conclusive. There are no 6 month waiting periods.
.

[b1020]

Please one more confirmation to clear my mind from the false info given by my GP , my 4 and 5 months negative tests are 100% conclusive and I can plan to resume sex with my wife? Thanks a lot, you guys are brilliant

[b1020]

Apologies Teak, we must have sent the last messages at the same time even if you re-sent the same message I understood that I can move on thx

[b1020]

Teak I was re-reading my post and can you tell me why in other answers you have been clear stating yes at 3 months is conclusive and in may you say IF? Thanks can you confirm if I can have sex with my wife again? Thank you

[Teak]

You can have sex with your wife.