The waiting is terrible: Husband has Stage 4 prostate cancer

My husband just got diagnosed with stage 4 prostate cancer.
This is how it started.... He's 55 and in good shape/ works out and eats right etc. The last year or so he's had urinary problems or frequencies and ED, but all of last year was super stressful, he lost his job and his parents passed away after he/we were taking care of them (in their 90s) He finally went to the doctor and thought he just had enlarge prostate etc and wanted it checked out. PSA was 251!! Then that triggered him getting a CT scan two days later and that showed cancer and in the lymph nodes (googled it and it shows stage 4 or 3), met with a urologist a few days later and he confirmed LATE stage prostate cancer (stage 4) but want to do a biopsy, which he got gone a week or so later and Gleason scores were mostly 8 and 9s and groups were 4 and 5s....referral to oncologist still, then in the meantime the PSMA PET scan two days ago and at night the results showed heavily in the lungs, lymph nodes, bones, skeleton, pelvic area etc...(again we google stuff and knew it was bad) we can't see the oncologist until 10 days from now! the waiting is terrible!!
We don't even know if they can do anything!!
The only symptoms are frequent peeing (or at least trying) about every hour and ever since this started I noticed a slight cough, nothing major but I immediately thought LUNGS (and was sadly right)
Just really sad....