Yes Lew, I think everyone gets days like that. I will normally just try to slow down, not force myself to go fast and just enjoy a more leisurely ride, placing the emphasis on other skills - just trying to ride as smoothly as I can, let the other bikes pass.
I find one way to get back to where you were, is to pick a destination, a place of interest to visit or something like that, so the focus of the day is taken off of your riding - you're just using the bike to get there. Make sure you choose a nice route, perhaps with a bit of good scenery, and of reasonable distance to make sure you are actually on the bike for a good part of the day. Quite often, by the ride home, you'll then have relaxed and soon pick up the smoothness again.
And another thing I sometimes try is to pick a more "technical" kind of route that requires slower speeds and, again, a different kind of riding. Our hilly regions are ideal for this - you want a narrow country lane where speed is of no use to you, but balance, considered braking and just generally better low speed skills come into their own. Poor road surfaces, sheep in the road, wet, gravelly mountain roads......I can get as much satisfaction out of this kind of riding as I can get from being fast in the twisties.
But if your confidence level is down like that, the one thing you don't want to do is try to force the pace. You're not about to lose the championship, you can afford not to push yourself. Mental state can affect your riding a lot too, so even if you stay off the bike for a couple of days until you're generally in a better state of mind, can be a big help.
Just some ideas, may or may not work for you, but hope it helps