I have very severe anxiety and have recently stopped going to school because of it. My DofE expedition is in two days and I am very nervous as on the practice I had two severe panic attacks and I still don't know what triggered them. Has anyone else experienced this?
Do they know of your issues? The whole point of DofE is to challenge you a little - to try to get you to stretch what you thought you were capable of and open your mind to possibilites and to surprise yourself with what you can actually do if you put your mind to it when working with a team.
If you write down all of your worries and concerns and have a chat to the organisers, (with your parents if needed) I'm sure they will be able to make it work for you.
I used to be a scout leader with Explorer Scouts - DofE isn't there to panic you - quite the opposite.