Does hiv take a year to show positive? read about a case that took a year and another took 2 years i tested negative combo at 6 months is that good?

Any report of HIV not being detectable for a year is blatantly mistaken. It doesn't happen, and there has never been a scientifically reliable report of the antigen-antibody (AgAb, "combo") tests taking longer than 45 days to become positive -- except sometimes in people who took anti-HIV drugs as post-exposure prophylaxis that didn't work. Your negative tests are 100% proof you do not have HIV.

HIV testing is done 4-6 weeks after exposure. A positive can show up as late as 3 months later. If you are negative after 6 months than no worry. Those who tested positive 1-2 years later where negative than got infected.