Hi there, welcome along, although it's somewhere you dont want to be.
My PSA was 4.8 and I had a biopsy based on my MRI identifying two areas of concern that were likely to be cancer. Cue being terrified for a few weeks.
Im not sure what a systemic biopsy is? Have they told you if it will be transrectal or transperinneal? Just a bit of difference between the two. But really nothing to worry about at all. Pretty painless and over in a very quick time under local anaesthetic.
The thing about this process is the waiting about for information. You are on a conveyor belt which flies along in certain places and then goes on the Blink so that progress seems glacial by comparison.
Hopefully a big flipper arm will push you off this conveyor at the same point it did me, dumping you into a reject bin for the non cancer time wasters.
But if the biopsy does indicate cancer then you will transfer onto another belt taking you somewhere else in the factory. Im sure others here will be along to fill you in about those next steps.
The hard part is just taking things one test at a time, one step after another. The lack of control feels terrible, but it is what it is...the Law grinds exceeding slow but it grinds exceeding small. The NHS, well it got the memo about slow, let's put it that way.
Try not to worry, but thats like me saying try not to breathe for the next few weeks. Just try not to worry about things that haven't happened yet, as they might not.
Best wishes for your biopsy, mick.