My waters started to go in small gushes at around 1.30am and we're tinged with blood, first contraction started at approx 2am and brought me to my knees.
They were straight away 2-3 mins apart, called the hospital and they said if I go down I'd probably be sent home again, I went down at around 3am. Was left in reception for an hour labouring in front of family members awaiting news from those on the labour ward... The receptionist didn't believe that I was in progressive labour as I appeared to be handling it (I really don't feel that I was) I then started feeling sick and one of the waiting onlookers gave me a carrier bag.
Had to wait for a woman to decide if she wanted to be on the midwife led unit, as only one room left and thankfully I was led up there at 4am.
The whole way up there I felt like my waters were about to go, so had to keep stopping. As soon as I got on the bed to be examined my waters went in a spectacular fashion.
I was then examined and found to be 5cm, got in the pool at around 4.20am ish, threw up a lot and was threatened with a drip if I didn't drink something. So my DH gave me still lucozade between contractions. I remember looking at the clock at 5.30 and thinking that I've got hours of this ahead and wasn't sure how I'd cope. I said at one point "I can't do this", was offered gas and air, tried two puffs but didn't like it as it changed the breathing rhythm that I had already established (from hypnobirthing).
I then remember feeling a click in my pelvis and a sudden urge to push, must have been near to 6am. I thought I was wrong as couldn't be needing to push already, but then got the urge again and told my DH and Mum to get the midwife. I really upped the vomiting at this point, it was not pretty.
I then remember feeling like I may have done something and got a glimpse of the sieve going into the pool 
Felt hot and bothered, so ended up getting out of the pool after an attempt to push again and cuddled a beanbag on the floor, still being sick. Midwife tried getting me to lay on my side but I found it easier on all fours. She then took me to the bathroom and sat me on the toilet so that I could properly bear down to get the head out, one push and pop. I had to waddle back to the mat very quickly with my daughters head hanging out between my legs... Utterly bizarre moment. Two more pushes and she arrived, very clean! I had a second degree tear, they only stitched it because it was deep rather than long, recovery from the tear was absolutely fine.
You do forget the pain. I remember being shocked by it, and know it bloody well hurt but staying relatively calm helped me in the end. She arrived at 7.17am, so all in all it was pretty quick in the end :)
I did try the gas and air properly when I had my stitches and it was lovely :D