Gallstones

I have gallstones since having my son four months ago. I’m due to have surgery to have my gallbladder removed. I can’t bare the thought of being put to sleep and I’m totally freaked out by it. Am I being dramatic to be so worried about risks and all the things that could go wrong? Has anybody any experiences they could share? It would be much appreciated by a stressed out mumma. FYI I’m in the uk and they have told me it will be key hole surgery so is that better? Any help appreciated?