I had 2 disabled sons sharing a bedroom and was in band A (the top of the housing list) however it took me almost 3 years to be made an offer and that was from a housing charity not the council.
They simply dont have the properties anymore, I know families with 3 children living in 2 bedroom tower block flats waiting an eternity to move.
phone up your council and ask where you are on the list and what band your in (I assumed you applied for a transfer?)
In the mean time its worth looking at renting privately or council house exchange
http://www.exchangeforum.co.uk/exchanges/index .php