NHS hysteroscopy after post-menopausal bleeding: pain concerns and sedation options?

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I’ve had a little bleeding post menopause and have been referred on the 2 week appt protocol for a TV scan and Hysteroscopy . I’m not especially worried and the bleeding has since stopped. But GP confirmed best practice to check out and also sent for blood tests which have come back normal.
I’ve read the hysteroscopy leaflet and a few articles about the process, notably a campaign group advocating better treatment and BBC news articles both which describe the process as being horribly painful . I just can’t do it. My last two coils have gone awol and removal and reinsertion has been absolutely horrific , with me being sick and nearly passing out.
I’m aware that they will rebook if I say I can’t manage with gas and air/ local but are the NHS sympathetic / am I being a big wuss.

I had a GA for hysteroscopy late last year. Good job too, because what was supposed to be a biopsy, ended up being an op to remove 18 polyps. Fortunately all ok. I had no bleeding after and was back to normal within 24 hours or so. Ask for the GA.