I am terrified of GA.
I've had two. You really don't know a thing - one minute you're being given the anaesthetic, the next, you're waking up with an oxygen mask on. It feels like a minute later. You see the clock on the wall and work out its been however many hours.
You can apparently be tranquillized first. Take that option. I wish I had, and I will next time. I understand your fear. There is nothing that really helps if it's a deep seated fear of yours, and I wouldn't suggest wasting your money on the likes of hypnosis - you don't know until you know. It doesn't matter how many statistics you hear about how safe it is, if you're really frightened of it, get a tranquilizer. That said, everybody has either had it or is close to someone who has, and virtually nobody knows anybody who has ever felt anything under it - it's the kind of anecdote you have to search the Internet for, and half of them are probably made up. And even if you're 85 years old and an emergency, your chances of not waking up are still negligible.
I don't know where my fear came from - I had one as a child, and one as an adult. I know I don't react badly, and it still terrifies me. My mother wishes she had a kit at home for nightly use, so it's not as if it's even a learned fear. I guess it's just one of those things you either take in your stride, or don't, depending on personality.
You will remember nothing - not very little - but nothing. Unless you are that one in a million, in which case, you are, memory doesn't even factor into it - you're gone until you're awake. Good luck with it all.