Then it is IMPOSSIBLE that you have HIV.
If you never have unprotected vaginal or anal sex with a person whose status you don't know, and you have never shared intravenous drug needles, you do NOT have HIV. If you don't ever do either of those, you will never have to worry about HIV.
If you are suffering from an irrational fear of HIV, then it is a good idea to seek therapy. Therapy can help you overcome those fears.