A sudden jump like yours in just months is not typical of cancer. More commonly cancer causes a slow steady rise over many months to years. Assess all other causes of prostatitis, and then potentially selectMDX test.
I went through this whole rodeo. PSA did a little roller coaster dance over about a year, peaked at 9.2 during that time. SelectMDX showed little to no chance of cancer, but PSA persisted, so i went the whole route: 3T MP MRI, which showed suspicious areas, but not typical of cancer... followed up by in MRI targeted plus standard spread (like TRUS 12 needle, but in bore in the MRI) biopsy... result, no prostate cancer, rather infiltration of prostate with CLL (Chronic Lymphocytic Leukemia). I'm a bit of a unicorn, this is rare, but it wasn't prostate cancer.
My personal bias is to not jump to TRUS biopsy. This can put you on a high pressure train from your uro for procedures. Read the inspire prostate cancer forum in depth, and look up my and orrin israel's case histories here on
excelmale. There are a couple other wormholes to follow here, I dont remember who else has been through this kind of scare to find it's not cancer here on the forum.