JoAnn,
I had those same fears 5 weeks ago, all the way up to when they gave me the I don't care drugs. I was terrified.. I kept praying and praying and that helped, but I still was scared. I god through surgery fine and am down 30 lbs so far. Each day is better than the last..
Keep on your path, don't let the fear get you down, It is normal and natural. You will do fine. Find your faith and let it envelope you.
God Bless, you will be in my prayers
Tami