ExD
I'm not sure, but I think you could ask for light sedation, where you are not quite 'under' and able to follow instructions, such as 'hold your breath, but feel no pain.
My husband had it when he had a colonoscopy and says he remembers nothing of the whole procedure.
Ask, beg, demand.
(they have to keep you in hospital a few hours longer when they want rid of you as soon as possible)
As an ex Gynae nurse, and well versed in this procedure, we did not want to get rid of patients as quickly as possible. Hysteroscopy is normally done in an outpatient clinic, which has no beds, although if necessary women can be taken to a ward bed. You can request it done under a GA, which means hospital admission. Colonoscopy suites regularly give sedation, and are therefore equipped to deal with post op care, and have recovery chairs. So if really worried talk to your Consultant.