These questions come up very often onthis board.
The responses are always 50:50- some women are fine without any pain meds/ GA, others are in agony.
So @TheGreenGoddess it's really hard to predict how you will cope.
I have had one with nothing (my choice.) The plan was to try it with nothing, local jab if needed, full GA if needed at a later date.
(This was privately, not NHS.)
I found it fine. It did take some time- 30mins compared with the average 10 mins- as my cervix was firmly shut. However I did not feel any discomfort.
Afterwards I did experience 'cervical shock' which is a reaction to being prodded, and felt faint, but it was easily managed by lying down for a while and a cup of tea. I managed to get home by public transport and felt ok the following day.
Personally I'd avoid a GA at all costs simply as it's more risky and the RCOG say that more damage - perforation of the uterus- can be done when using a GA (I expect it's because the dr is a little more rough when the patient is not conscious.)
Just some things to bear in mind.