I did the EBRT in 2018 --- 5 days a week for 8 weeks and did not experience physical issues until the last 3 weeks.
Being on a shorter treatment schedule may suggest that you could be receiving higher doses of radiation in a shorter period of time so feeling some physical effects earlier than I did . Always good to ask your MD for input
My issues were painful hemorrhoids some constipation and loss of energy. I did experience some burning with urinating but found the more water I drank the better it was all around.
Never had issues with hip pain but did discover that It was not necessary to have an excessive volume of water in my bladder prior to treatment. That suggestion offered by the radiation techs made it more comfortable . Hope that info helps a bit Dennis(ProstateCancer.net TEAM)