As an adult, the only risks for HIV are:
1) having unprotected, penetrative vaginal or anal sex, or
2) sharing IV drug needles with other IV drug users.
If you don't do either of those activities, you will NEVER have to worry about HIV. Nothing else you can think of is a risk for HIV.
I don't know why you were tested for HIV, but you didn't need the tests at all since you were never at risk. In any case, you are DEFINITELY HIV-negative and you don't need more tests.