Dan, we've all been there, and the way you're feeling at the moment is completely understandable. Unfortunately you are in for a lengthy wait (probably 1-2 months) before all the tests have been done and a diagnosis can be given. Given your significantly raised PSA level, the urologist will almost certainly advise an MRI scan followed by a biopsy. If the biopsy comes back positive (and it may not, of course) there would then normally be a bone scan to make sure the cancer hasn't spread. Each of these stages of diagnosis will take two or three weeks.
If you are struggling with anxiety (as I myself did) I'd strongly urge you to visit your GP and get something to help. My GP prescribed a drug called Sertraline, and it really helped me.
If you have any medical questions about what's going on, have a chat with the PCUK nurses on the Freephone number at the top of the page. They are very knowledgeable and helpful.
Until you get your results, just take things one day at a time, DON'T assume the worse and DON'T consult "Doctor Google"!
Best wishes,
Chris