Weejo, that really isnt good!
Not if you really wanted to do the classes and have already been moved once before.
We didnt do any classes with Ds1, and we havent with this one either.
Partly cos we live in the Netherlands so we would have had to attend a class in Dutch (our dutch is not that great to be able to understand what was being said)
Or we'd have to find one of the very expensive, English classes here.
Although i dont know for sure if a class would have helped,
Not going to one definatly didnt hinder the process.
Every labour is different, they can tell you what to expect and give you ways to deal with it, but i really believe that your instinct takes over to a certain level when you are in labour.
I think what i am trying to say is dont worry too much or get overly stressed if you cant switch to another class.
You will be fine, just listen to your instinct and the delivering MW, she will
help with how to breathe, suggest positions, etc...
(sorry if i sound dismisive or patronising i just wanted to try to reasure you everything will be fine)
Xx