sigh

I need to work out what is wrong. Some nights I can barely play guitar. My voice is a wreck. I butcher songs I have done for years. I do however waltz through songs that I pull out of the hat.

Woman I Want - lazy and slow.
Color Of Your Eyes - I can't seem to play this song right anymore
Things You Never Know - perfect ... weird seeing as how I hsven't done it in months if not more than a year
Standards - so-so ...

still, I'm glad I went, but I have to work out what is wrong.