I wouldn�t worry about it at all. I�ve only had one op, which was done as an emergency, so luckily I didn�t have time to anticipate beforehand what it was going to be like. Otherwise I would have been a bit anxious, naturally.
The anaesthetist was really nice and she made it very easy for me when I was on my way to the theatre � next thing I knew, it was all over! You might get some pain when you wake up, but they�ll give you something to lessen it. I didn't feel any other effects at all after waking up.