Nothing to add to what you have been told.
The official hiv window period is 3 months post-exposure and has been since 2004.I don,t know where you got the idea that it was 6 months,thats wrong.Your second incident where you had no sexual peneration was zero risk as you have already been told.Your safe,you don,t have hiv.
No HIV risk thus no need to test.
The scenario at the end took place after the negative result
It wasn't even an HIV exposure at the first place and your test result proves that. Any negative test result beyond 3 months post-exposure is conclusive and exposure is something you didn't have back then.