I've remembered another one! Having a D&C with only gas and air. All part of the same experience as one and three above. This is what happened:
I went for my 20 week scan, feeling nervous as our last baby had died around that time. This time I had felt the baby moving the day before, but no heartbeat on the scan or the subsequent scans done by another sonographer and the consultant.
Took the pills to get labour going. Pessary to speed things up. Worst labour pain I'd had before or since. Wished they would just kill me and be done with it. Daughter born, looked tiny but beautiful. Placenta not budging.
Several hours later, still waiting for D&C as emergency theatre busy with actual emergencies rather than my non-life threatening stuck placenta. Finally, in the middle of the night, we get a slot. Anaesthetist gives me a spinal for the D&C, but it doesn't work. They give me the choice to have the D&C with gas and air, or wait to see if the anaesthetic kicked in but maybe miss our slot.
By this point I was fed up with wandering around with an umbilical cord hanging between my legs. We had said goodbye to our daughter and I wanted to go home and grieve. So I went for the D&C, took gas and air. It was awful.
Back on the ward, I tried to get up to go to the loo, and that's the time the spinal anaesthetic started to work. As soon as I got home, I realised I had a spinal tap. Imploding, excruciating headache which became unbearable every time I moved out of a horizontal position.
After a couple of days, it started to ease. Then my milk came in. 