everything will be fine. evrything you stated sounded no risk and the 6 month negative pretty much proves that. go get your conclusive 3 month and expect another negative.
protected anal no risk for HIV as long as the condom did not fail. Oral sex no risk.your symptoms are not related HIV. if it makes you feel any better get your test but expect negative results.
A bit rich coming from me, given that I posted below, but from everything I have read (a lot) oral sex has practically no risk, protected means what it says and those symptoms seem nothing like anything I have read about hiv. Nothing to worry about. Good luck.