At certain point of severe anxiety you do your best to confirm to your self that you are +ve hiv . I think you have such problem , you do not need to retest but you really need to take appointment with psychiatrist who is special in such problem of fixing hiv . You do not have risk and you know that, even you mentioned every literature confirm that hiv not transmitted this way . Even if you have risk you were overtested to confirm you that you do not have . Please do not waste more money for fixing hiv and instead use the money for psychiatry visit .
You didn't have a low-risk event. You had a NO RISK event.
The only risks for HIV in adults are:
1) Having unprotected (no condom) penetrative anal or vaginal sex, OR
2) Sharing IV drug equipment with other IV drug users.
You can't get HIV from someone's hands or breasts, even if there is fluid on the skin. It isn't a matter of being lucky or unlucky - HIV transmission methods are straightforward and well established.
As far as your exhaustive list of symptoms and testing, I am NOT reading all of that because none of it is relevant for a person, like you, who was never at risk for HIV. If you are having medical issues, see a doctor, but the issues have nothing to do with HIV.