TraineePilot01, I too suffered a bad case of nerves before my initial I/R, and come to think of it my renewal also. This time tomorrow I'm sure you will be wondering why you felt like this.
As time goes by the flying tests do get easier to manage. There will still be some aprehension but this is required to step up to the plate and perform well.
Keep positive you'll do great!!!
Just remember to take a few breaths and get stuck in, be cool.