Newbie2025 confused

Have just started hormone therapy prior to radiotherapy I think I am getting hot flushes but I'm not really 100% sure I get hot but not particular sweated. It seems to accure mostly when I'm in bed. I'm also a walker and do mostly 4 miles every other day but seem to be getting tired towards the end of my walks.However I play badminton twice a week fo 2 hours and that doesn't seem to be effected. I am obviously reading lots about the effects etc and wondering if I am looking  to find the side effects rather that actually getting them, all very confusing.