I am totally confused plz help me .I am hiv negative or not (lk)

I had a risky encounter with a married women of years .I had Manny times unprotected sex with women( not knowing about hiv )and after 5 years of not doing anything with her . I learned about HIV and soon after got scared so I went to my local health clinic and got an (single)Elisa hiv test and it came negative so my questions are

1. Am I good I don't have HIV ?

2 .Can I trust these results I heard after 3 months its conclusive but is it conclusive after this many years.

3.if these results are conclusive should I stop worrying about hiving HIV .