Wow. I'm so far from that....now I am feeling depressed!
I find that when I am in a crap mood, any of the songs I was even halfway into sound terrible. So my suggestion is hop over to one of Aldrine's lessons and grab a new song. Something on the order of "Drop Baby Drop" or "Sunday Morning". Good songs, fun to play. Most importantly, the concentration level you need to apply to a new thing absorbs the funk like a sponge.
Also, I haven't been yet, but sign in to the UU mini jam. If you can play along with some people, it might help.
Play on.