I am sorry you are feeling fatigued. I have been on prednisone for about 5 years due to lupus. It helps with fatigue. It is a nasty drug but sometimes in order to function it is needed. My doc explained that inflammation can cause fatigue and prednisone helps with that. The most important thing is if it helps you. If it does then you should go back on it for a little while.
I know that pacing yourself is very important and I know how hard that can be. Maybe you need to plan out your days better. It does suck, but that is what I have had to do. You also have to realize that life is different right now, so don't be so hard on yourself. With time you should be back to your old self.