Radiation treatment on T3 vertebra for spine mets and Lupron

Had a proctectomy 5 years ago. The cancer spread to my T3 vertebra. I had the T3 treated about 10 times with radiation.
I received 24 months of hormone therapy (Lupron injections). I have been off Lupron for almost 3 years. My main side effect is now fatigue. I still lift weights a few times a week. I have been walking 3-5 miles daily for years. My testosterone level was 10. After the Lupron my testosterone level had not changed. I injected .5ml of testosterone monthly for about 1 year. I was hoping this would help bring up my testosterone level and reduce my fatigue. My last blood test for testosterone was 210. This did not help with the fatigue. The fatigue is mainly in my legs. They feel heavy. I was wondering if anyone on this site has experienced this. If so, what did you do to fix this condition? Thank you.