Sez, I found the gas very soothing as a way to focusing my breathing and also something to bite down on.

I think Kelly makes a really valid point with the TENS, there is nothing to actually focus on breathing into iykwim ( I know the gas isn't for everyone, but just an example) Once you get into a good routine with the gas it just comes automatically. As soon as you start to feel a contraction you want to breathe - hence breathe on the gas. I would have killed any person that tried to take that mouthpiece away from me! lol

Although this time I am going to try and avoid the gas as well!

Goodluck!