I kinda had the same thing when i did my hgv test, i came to stay at my mums place as that is where my test was booked. Sat in bed at about 9.30 and i get a phone call....."Hi Joe its the training centre, are you coming to the lesson today?"
Me" well it aint till 10.30 is it?", "no that is when youre test is the lesson should have started at 9"

Shit the bed shower shave got out the door into the metro 25 mins down the road, got there at 10.15, straight to the centre no lesson, hadnt driven for a week and passed it first time with 5 minors....Didnt even have time think let alone worry...

You will be fine, enjoy it and stay clam...Sure youll be fine...

Good luck