I never heard of a PSA that high being related to other than prostate cancer. The alarming aspect is that you have symptoms of pain (leg and back), which if found to be related to the cancer it would diagnose you in an advanced stage T4. PSA=222.5 is not new. There have been many guys reporting PSAs in the thousands mark.
You definitely are in need of finding more details about the problem with more tests and image studies. Only a biopsy will rule cancer and will give you info on its aggressivity.
Nevertheless, there are successful treatments to control cancer in advanced cases with high PSAs. Do not be anxious but act the soonest.
Welcome to the board.
Wishing you good luck on your journey.