Welcome to healthcaremagic community forum!!!!
What symptoms are you suffering from?
though possible is extremely rare... Accordingly you being infected with HIV, inspite negative tests done over period of 3 years is extremely rare...
Hence, I don't consider any of the symptoms to be related to HIV infection...
You don't require any further test when western blot test and HIV PCR test have been reported negative..
Hope this lightens your heart...