I just did mines about two weeks ago, i found the most nerve wrecking thing actually leaving the ground on takeoff. But talked to myself the whole way and tried not to let any bad thoughts in.
My instructor always made me constantly call out Picture, Power, Speed on the approach which really helped, and it was probably the best landing that i have done.
Found myself trying to reach takeoff speed in the car on the way home
Make sure you enjoy, as you will always want to go back to this day and re-live it!