Having the Spinal was nowhere near as bad as what I thought it would be. I was nervous obviously but the team were fantastic and really put me at ease. The Spinal didn't really hurt at all, I was just very surprised at how quickly it started to take effect.
I didn't like the feeling of being numb from the boobs down and I felt quite anxious during the procedure but I'm an extremely anxious person anyway.
The CS itself is too surreal to put into words - you can feel your body being shook around and you know the surgeons are cutting away and pulling a baby out of you but you can't feel anything. You can feel a bit of pressure but that's it. One minute your body is being shaken about and the next they're holding a baby in front of you - really, really bizarre. They still had to use forceps to help get him out though 
Getting him out took a bit longer than they anticipated because of his size (maybe 12 minutes in total) and then they had to stitch me up but there were a few minor issues with my womb not contracting so I had to have drugs for that. As a result the 'stitching up' process took a little longer than anticipated and the whole thing took just over an hour from start to finish.
I was very surprised at how drowsy I was during the procedure - I could barely keep my eyes open. The anaesthetist explained it was normal and because of the fact that 80% of my body was shut down and so the brain sort of 'switches off'. I was lying there with my eyes open and thinking, "My baby's being born and I'm going to miss it" - I just wanted to sleep and had to force myself to stay focused on my husband.
It wasn't what I thought it would be, I didn't feel as calm as what other people had reported and it wasn't until I was stitched up and being wheeled into recovery that my anxiety started to ease. I genuinely think this is due to my character though as opposed to anything else.
Good luck on Wednesday and you can always PM me if you have any specific questions