What you feeling is totally normal, I can’t tell you how many nights I spent crying over my BA and then when I finally did it I was like, oh! Is that it? lol. I was getting anxiety dreams and everything; I thought I’d be freaking out and crying on the day but I was completely calm…You are in great hands hun, I know it’s mega scary, especially if your like me and have never had GA before, but you’ll be fine 
Good luck
xx