What to do or take for decreased energy

I have a Pituitary tumor and since I started taking my medication I have almost no energy. I am tired almost everyday on the days I take my medication I sleep most the day away. I also have arthritis with possible disc disease and can't take my pain/ muscle relaxer because it makes the tiredness worse. I see my Endocrinologist in a couple of days and the Neurosurgeon next week. Will be asking them both about the tiredness and daily headaches no matter what I do. If anyone has experienced this what worked for you that didn't involve prescription drugs. I have five physical therapy appointments left for my back leg and arm and sometimes feel worse when I leave because it wears me out.