Anxiety over driving test

Hello,

I have a driving test next Friday and I am really anxious as mum and dad have given me money towards my lessons and I dont want to fail my test because I would feel like I had wasted their money.

Also I get really irritated when I am stressed and overwhelmed and I ended up lashing out at a family member and I feel horrible. I know that until the test is over I am going to be a nervous wreck and really snappy.

Does anyone have any advice?