HIV risk?

I was at risk about 3 years ago, I’ve been tested a few times since then, the last time being in June. I’ve always gone to either a free clinic

Or the township health department where they do the 60 second test or the 20 minute test. They’ve all been negative but how sure are they? I’m

Freaking myself out that I still could have it. I’m driving myself nuts. Should I just trust the tests?