cardioversion jitters

Well tomorrow is finally the day I have my cardioversion. I'm scared silly. Mostly because I'm afraid it might not work and I don't think I can stand the effects of this A fib much longer. It has gotten increasingly worse and unstable. I am busier than ever so I don't have to stop and experience this irregular pounding and skipping and I'm exhausted. This week I have had horrible crying spells. I can't wait until this is over.