Don't know if you'll see this before your biopsy, but it might help you to know my older brother has had THREE biopsies, all negative, with a PSA in the 9 range. He's on Flomax now and doing fine. I, on the other hand, turned out to have cancer, as my signature shows. So, yes, there are guys who have biopsies and never turn out to have cancer, so try to think positively.
In either case, it's much better to know than to live in ignorance of a cancer. Worrying won't change the result, so try as best you can to prepare for either eventuality. Good luck.