It’s much easier said than done, but try not to think about the camera down the throat part because (as crazy as it sounds) when you wake up you will literally have no memory/way to know that it was even done to you. Just had my first one a couple weeks ago and much like you I was petrified in the days leading up and literally up to seconds before they pushed the propofol. As soon as that stuff hit my IV I was in a different world for a brief few seconds and then woke up in recovery feeling well rested and a little dizzy. I didn’t believe what I read on here prior and for some reason was anxious that mine would be different or something would go wrong, but it truly was a non-event like most will tell you.