Ive had the endoscopy, camera down the throat, they either spray your throat with a numbing spray, the camera looks like a black hosepipe with a light in the end of it,youre asked to lie on your side, and slowly they put the camera in your mouth, theres a mouth guard to stop you biting it, IT DOESNT HURT, DURING OR AFTER,a nurse will probably hold your arm, i asked if he was just being freindly, he said people have tried to pull the camera out, so thats why he held my arm.
After you get some toast and biscuits and a cup of tea.
Askm questions, and watch the tv screen, if you want to , its all hi tech
Best wishes .