Sounds strange CM. I’m sure you have a right to be moved just like anyone else; although I hear this is not easy to pull off due to the amount of people wanting housing. Have you and your mum considered trying to organaise a house swap with another council tennant? I’ve see this done before, obs you’d need to find out if you could do this in your area, but I have known tennants to swap before.
Perhaps another way of approaching this is for you to apply for social housing? Make a new claim? You could be a priority because you are expecting and the DA should also bump you up the ladder as well but there are forms of course and a few things that need to be done for this. Can you call WA to find out? x