Not sure if this helps, but in my case, I had a period of really bad backache which seemed not to respond to the usual pain relief and went on for a while. It was actually part of what prompted me to have a PSA test. I became convinced that the back problems meant that things would turn out "really bad". In the end, the backache was completely unrelated and went away of it's own accord, oddly around the time of my second PSA (and hasn't returned). I've had prostate surgery, post op results are encouraging and my recovery is going more or less to plan so far.
I (plus my partner) found the early days the worst, most unsettling time. Don't blame yourself for feeling anxious - it would be odd if you didn't. Good luck with the result and come back to this forum with any questions or just to offload.
John