Hmm, I would take every precaution in the world as the negative result is only valid for any exposure 3 months before testing.
It can only detect HIV infections prior to sometime in August , depending which day he took the oraquick test,
which BTW is NOT 100% foolproof!
I know my comments are not gonna do anything to help with your OCD, however, they will likely help with appealing to your common sense for keeping you "safe".
There's no visible 2nd (faint or otherwise) line on that picture, if this is any consolation.
Cheers,
Niko
PS
A new guy(s), hopefully means just one.