It's common to be nervous I always am when I go for a scan or any test for that matter.
I cant help you on the PSA side, that wasn't my type of cancer. If you will post this again in the "questions" tab at the top of the page in the purple bar, it will be posted on the questions page for all to see, and also it will be sent out to those in the network that can best answer it for you.
Give it a try and you'll get some answers.
Greg P
3x Survivor
Team WhatNext
Community Mgr.