more than 90 days and still so tired

Fatigue can't kill me but it sure makes me tired and impossible to work. Get up every day, and am able to do a few things, but go back to sleep at some point and for several hours. Wanting to start walking again, but cannot even think about it as I am afraid of it making me more tired, or getting stuck somewhere and not having the energy to get home. From reading the other cancer blogs and websites this is fairly common, as are the problems I have having with my hands, including the trigger thumb which I thought was repaired in 1997 and is now back with a vengeance, painful and making it difficult to grip things. Back to the doctor next week and we'll see what he suggests for all of it.