Like everyone else who has had the same queries and suffers from any degree of skeptical thinking:
We expect that some time down the road we'll get, "Hey, just kidding, you have HIV those tests were wrong".
Thank you very much for your affirmations and timely response :-)
Hiya, well you either had unprotected sex or you didnt, and that would define if you have a need to test in the first place.
As you have, you most certainly dont have HIV. Its impossible to have 4 negative tests that are all false, impossible.
You can relax, you have nothing to worry about.
I hope that helps.