I was offered the choice too and chose local, then on the day when I spoke to the anesthetist, I changed my mind and went for general.
I'm quite glad I did, for both physical and psychological reasons.
I had had a medically managed miscarriage (which didn't work in the end, hence the ERPC) I had 7 rounds of pessaries being inserted, each time I was about 20 minutes in the stirrups, and while it didn't hurt I was aware of everything and got more and more anxious every time.
I don't know if you have been through a lot of poking and prodding recently, but I found that I just didn't feel as strong as I did before about those things and didn't really want to "be aware" during another procedure.
After the ERPC my doctor told me that they had found more products than expected and in the end the procedure had been quite complicated. I am really glad I didn't have to hear them say that as they were doing it.
I am sure a local wont be painful, and if your particular case seems uncomplicated, it should be quick. At the end of the day general for me meant "blissful ignorance" but if the idea unnerves you, its not for you.
You will always talk personally to an anesthetist before any procedure though, so you have an opportunity there to go over doubts.
I wish you a speedy recovery,
xxxx