Anxiety about Scheduled C Section

I'm currently scheduled to have a c-section tomorrow morning. This was a last minute decision made yesterday due to the size of my son who is supposedly measuring close to 12 lbs. We know the sizing isn't necessarily accurate, but I hate the idea of laboring for hours just to have an emergency C-section because he can't get out.

That being said, I'm absolutely terrified about having a major surgery like this, specifically while awake. I'm fine with the spinal and don't really care about pain, but just the thought of being cut open while still awake really disturbs me and I'm having trouble getting past it.

Anybody else go through this? How do you cope?