Enter at A, try not to freak out

Yikes.
Why do I do this? I know I hate doing dressage tests and I always get nervous and I tend to end up just depressed at the end of the day.
I am trying to learn 2 tests that are horribly similar to each other. At least I will have some support people around this weekend, so I guess I can grab a caller if it all goes pear-shaped. But I have to get used to not having that luxury, because I want to event and the rules are different there...