I can sure relate to all of that. I had the same, 28 treatments of radiation, which ended a year ago.
It is just now improving, but for months during and after radiation it was endless peeing. Also, 4 UTIs
last year! The bladder and prostate can be extremely inflamed. Phenazopyridine(AZO) did help some, but
not a lot. Recently a full bladder irrigation helped tremendously! Good luck with your treatment, it will get better, but may take some time. Prayers.