Some relapses while on Prednisone

I've been on a low dose of prednisone for about a month (20 MG), once daily. Works great - felt like a new man. Then I suddenly had a bit of a relapse. I checked to be sure I didn't miss a dose (and I hadn't).

This is the first day of not feeling very well. Anyone else have a 'backsliding' day like this? I have my fingers crossed that's it a weird glitch and nothing more.

Good health to all!