If this is a private tenancy and your husband is still living there with you then you need to contact the local council about alternative housing for you and the children. This means you will in effect almost certainly have to leave your husband because the council will not have a duty to house him because - by simply refusing to pay the rent - he will have made himself intentionally homeless.
However, none of this will come about until the rent is at least 2 months in arrears because the landlord can't start the Court possession process until then.