Sorry to hear.
You need to do your homework and make the best decision for yourself regarding treatment.
In 2008, I had a radical prostatectomy for aggressive prostate cancer at the age of 54. Cancer was in both lobes, Gleason score of 4+5=9, largest tumor 2.1 CM. There was extra-prostatic extension, left seminal vesicle involvement, and perineural invasion. Stage: pT3b, N0, MX. Oncologist gave me 2 years to live, and started me on androgen therapy (chemical castration) immediately for 6 months. Because nerves were removed, I have total ED... injections are the only way for me to get it up. I was already dealing with incontinence, so still in diapers, though I no longer have bladder spasms.
In 2011 my PSA returned. In 2012 I pushed for salvage radiation, though two oncologists said it wouldn't help. I am 64 now and still in remission.
I biopsies at 50, 51, 52, 53, and 54. Cancer was found on the last biopsy. A Gleason score of 4+3=7, indicated it was on the aggressive side. My urologist informed me that his surgeon was booked up for 6 months, but not to worry, as prostate cancer is a slow growing cancer. I demanded to be referred to a top urological oncologist for another opinion. A week later my prostate was removed by the urological oncologist. The largest tumor was nearly the size of a normal prostate, and the cancer was already beyond the prostate capsule. If I had waited the 6 months, I would have been dead a long time ago. I'm telling you this, not to scare you, but to let you know that YOU are in charge of your health, not your doctors.
DO NOT let a doctor tell you it's a slow disease. That may be true for most men, but that doesn't mean it's true for you. I was very pushy about my treatment and it has paid off. According to your profile you are 48. That is young, indicating higher chance of aggressive cancer. A PSA doubling time of 12 months or less also indicates a higher chance of aggressive cancer. Do your homework, choose your course of action, and demand to be treated in a timely manner.
Also, take the time to grieve. This is a life changing moment. Hopefully you will come out of this with no ED and better bladder control. Feel free to message me if you have any questions or just need to talk.