You are negative. It doesn't matter if it was 12/13 weeks.
just to clarify im in the US
u dont need further testing...in most countries 3 months is considered as conclusive...congrats mate..ur safe...all the best and forget hiv now..i wish i get the same result next month..then i can move on peacefully too..cheers
12 weeks is CONCLUSIVE! You are negative, put this behind you!