I'm so sorry for your loss, MummyTwo. My first pregnancy was a blighted ovum and I started spotting at 6w4d and miscarried naturally. It wasn't physically too painful. My second pregnancy was a missed miscarriage that wasn't picked up until I was 11w3d when I started spotting. A scan showed that the embryo had stopped growing sometime in Week 7. I was booked in for a D&C the following day but woke with very painful cramping/contractions and was taken into emergency. My cervix was blocked with "product". I had a D&C (which are performed under general anaesthetic) and there was no pain afterwards. I was released from hospital that afternoon. If it happened to me again, I'd choose to have a D&C.
I don't know if that helps. Again, I'm so very sorry for your loss. Sending big cyber hugs your way and thinking of you.

xoxo Kerry