To the OP, I would say get a complete blood panel done, including the T test. Your symptoms might be low T, or hypo-thyroidism, or anemia---or even sleep apnea!
I would encourage all guys over fifty to get their T levels checked. T-levels can sometimes be very low (which seems to be a risk factor for prostate cancer) and you can have no symptoms at all. I had symptoms of weakness, fatigue, muscle and joint pain with some swelling of the hands and wrists at a level of 300. My doc put me on a trial of T-Cyp and within two months all of the symptoms were gone. I've been injecting T-Cyp, 100 mg, every 10 to 12 days now for 16 months. So far, so good. Symptom free, feel good---but I won't be any threat to any racers! The amount of steroids taken by some of those guys is up to 10 times the therapeutic dose, so it's no wonder they have bad side effects.