Worried....

So I laid down with my son last night before he went to sleep and my mind began to think about the surgery and got myself all upset...I am thinking what if something happens to me during this surgery and I don't "come home"? I know the changes are slim that something bad will happen but I have never been under before and the thought of leaving my son without me was almost too much to bare to think about..of course I started crying...so I prayed and realized I do need to pray alot more about this to help calm me and get me through this safe & sound. Im trying to keep myself from being negative but its very difficult. I still cannot believe that I am really doing this....