Personally, its inbuilt that I feel nervous as fuck about most games and then incredibly nervous about the "bigger" games.
Even during the 4-1 there was something inside me that was saying, we need to score more, not just for the humiliation (although that was a big part of it) but more to ensure that we were out of sight.
On paper, we should have absolutley nothing to worry about it, but the games not played on paper, its played on grass and anything can happen over those 90 minutes.
I for one, just hope we start off well and get the all important first goal.
The nerves kicked in this morning when I woke up, i'll be a nervous wreck tomorrow come game time!