You really are holding onto this unnecessarily. You do not have HIV.
They are said to be inaccurate for false positives, a negative at your timeframe post exposure is conclusive as diver58 suggested.
An antibody test done 4 years after the exposure is 100% accurate and conclusive. It positively rules out the possibility of the infection. You do not have HIV, trust your test report and move on with your life normally.