Let Down

Today the quintet played at an area UU church. It was actually at my church, so I was pretty excited. I even PRACTICED this week! The first service went great and we sounded really good. Then came the second service. Why oh why must I always play worse the second time through?!?! It happens all the time. I don't know if it is because I am more tired, overly confident, more nervous (there are a lot more people at the second service) or what - but it never goes as well. It is so frustrating. I just feel really let down with myself.