I've name-changed for this as I've told a few people, so it's quite outing.
10 years ago I gave birth to my first child. It was a water birth and I had no drugs whatsoever during the entire thing - not even gas and air. I did have two paracetamol, but I don't think that can explain what happened.
Although it was 10 years ago, I know this is an accurate memory as I wrote down that day what had happened and I read it again yesterday.
When I was in the pool, in the late stage of my birth, maybe the last half hour, I started falling asleep between contractions. Let's say the contraction lasted a minute or so, then I had 3-4 minutes between each time - I would put my head down and would pass out/fall asleep. Every time that happened I instantly felt I was transported somewhere else around the world. I would be in a dream, a dream in which nothing really happened - I would just be there, observing a perfectly ordinary scene somewhere else in the world. I would be there until my next contraction started, at which point I would be pulled back into wakefulness, and the birthing pool. I would do my contraction, and then the cycle would repeat.
It wasn't a long labour, so I wasn't particularly tired. I had had a good night's sleep, woken up around 5:30 a.m when my waters broke, and this was happening only about four hours later at around 10 a.m. So it can't be drugs and it can't be tiredness that caused this to happen.
I've talked to a lot of people about their birth stories, and I've never heard anyone have one like mine. I'd love to know whether any of you did? (I think a complicating factor is that I don't know that many people who had drug-free births.)
I went on to have two more children, but this never happened again -- only with my first child.