Re: Trusting the MRI
Same here, a routine blood test showed an elevated PSA so I had a template biopsy*, that caused AUR that in turn needed a camera threaded through the urethra to put in a catheter. That stayed in for a while and eventually had a procedure** called HoLep that scoops out the prostate. Thankfully for me as well both the biopsy and HoLep results were negative.
* Unable to go into an MRI due to having an implant.
** Paid for as waiting list too long 4.5k if you're interested