PredniSONE and problem thanks

I just started 80 mg of Prednisone for Vasculitis in my kidney’s. I also have RA. This treatment is being augmented with low dose chemotherapy. The Chemo is nothing compared with the side effects of the Prednisone. It is Horrible. It has so messed with my brain I never knew what an awful existence obsessive compulsives live. I can’t sit still and stop doing things if there is anything left undone! I have trouble with controlling my emotions, responses etc. Thinking isn’t easy either. And I’m awake most of the night. (Not a bad thing since we just were blessed with twins however). But it is really straining my relationship with my 6 year old son who can’t understand why his Dad goes from nice dad to mad dad in a second. I’ve also have horrid muscle fatigue in my legs. For me this is the worst because getting up and moving and walking up stairs is almost impossible. And I was hiking up to 5 miles in rough terrain just a few weeks ago. I’ve actually LOST 10 lbs.

So I am wondering if anyone has any tips, tricks or ideas they have found to combat the muscle fatigue? It would be greatly appreciated if you could share any ideas you have. I’ve been drinking water and electrolyte replacements, (G-2, the new Gatorade) but that has not solved the problem.

Thanks.