Well, jeez Pam, wouldn't CRT be one of the most difficult songs you could choose to sing?
I know you like a challenge, but still, give yourself a break there sweetie.
One thing I picked out from your post is that the audience was more in favor of one song than another. I think that has a lot to do with their reaction...sometimes more so than the way you sing or play, it's what you are performing that gets the good or bad reaction.
You are always kind of hard on yourself. Pretend you are talking to one of your friends before you start all that self dialouge...what you are doing isn't easy no matter what you sing. You are at least trying and having a good time. The rest of it will follow.
St. Francis...my favorite saint.