"Hysteroscopy without anaesthetic"

I will start by saying I have no complaints about the team of nurses who looked after me.  I do however, think that the policy of advising women simply to take painkillers an hour before the procedure is ridiculous.  I have chronic migraines and know what excruciating pain feels like.  This was so much worse.  I went on my own, as I trusted the advice I'd been given - oh, the benefit of hindsight.

I am a grown woman who doesn't cry easily and with quite a high pain threshold and I cannot begin to tell you how upsetting it is to be laid there with strangers putting what felt a red hot poker inside you.  In the end, I begged them to stop, crying and shaking from the pain.  I really thought I was going to throw up or pass out.  Like I said, the team was great and did stop as soon as I said so.  I've been referred for a general anaesthetic and was sent for pre-op assessment straight after my failed hysteroscopy.  I have already had ablation and apparently that means scar tissue.  Scar tissue doesn't stretch.  I'm told that might be why it was so difficult, but if that is the case, shouldn't I have been referred for a GA anyway?  If it can be painful under normal circumstances, surely it was a given that I would find it extremely so?