You're on the right track and are receiving all the right advice, breathe and go through the process; you'll come out the other end I promise!
Halbert makes a good point on the exercise/sex before your next PSA. I'll just add that, in my case, I found that 2-3 days of abstinence from both did NOT lower my Prostatitis based PSA and it took at least a week to move the needle. I'm not trying to make life miserable for you... just to say don't skimp on that advice!!!
I was also advised by folks here to do an NSAID (I used Aleve) for a few days prior to the test and THAT had the greatest effect of all on calming things down. Track the PSA in my signature and you'll see what I mean.
Good luck dude, by coming ere you did yourself the greatest service of all.
7/14 PSA: 1.07
7/15 PSA: 4.3 DRE: Negative
7/15 PSA: 2.56
8/15 PSA: 8.5 PHI 47.5 DRE: Enlarged
9/15 3TMRI: 1xPIRADS 3/5 9mm lesion (benign)
11/15 UroNav Fusion biopsy
11/15 10% G6 one core left baseActive Surveillance (Hopkins)
02/17/16 PSA: 1.60
Next: Push my wife around the carpet
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