I was utterly terrified going into this procedure due to reviews online, and whilst it was awful, I was lucky that it wasn't as bad for me as for some (and I would like to say I'm a wuss as far as pain goes). I had mine at the Royal Hallamshire in Sheffield (UK).
I took two paracetemol and a mefanamic acid (a godsend) an hour before, and rung in advance to check if I would be able to get the gas and air (I have respiratory issues) which they were able to confirm I could. I would recommend ringing up with queries before so you maybe feel a bit relaxed.
I pretty much broke down the m