I had to chuckle (at myself) because your post made me remember my own experience. Having spent most of my life working in ORs, I'd seen and helped with scores of spinals and epidurals and they always gave me the shudders. I frequently said that is every anyone wanted to do that on me, they'd have to catch me first! However, when it came to my turn, I realised that the knee was of far more importance than the spinal so I meekly walked into the theater and 'assumed the position' on the trolley! It was actually fine. I also had told the anaesthetist that I wanted to know nothing - no tourniquet going on the leg, no doors opening, nothing. He was as good as his word and even as I lay down on the pillow, that was the last I knew until I was being wheeled along the corridor to recovery feeling all warm and cosy and pain free! That's the best of a spinal - no pain at all for the first 24hrs!
You go for it - it'll be the best thing you ever do!