Jakki wrote:
but I am scared,have woken up during major surgery many years back and was Quite painful and frightening . .
Oh dear!

That would be a factor, yes.
Will pray the surgery go well, be successful, and that it heals well and soon.
_________________
"There are a thousand things that can happen when you go light a rocket engine, and only one of them is good."
Tom Mueller of SpaceX, in Air and Space, Jan. 2011