Sorry to hear all this. Im in the same situation as your husband but im using once every 3 or 4 weeks. Sometimes longer.
I am doing my best to stop. I hate the stuff and when its wearing off and the downer kicks in i just cant take it anymore.
Going back to your question.. course you have done enough! It sounds like he has no intentions of stopping. I wish my gf helped like you are. I dont know the inns and outs.. but if its making you ill and cry so much.. you need to really start thinking of your self.
It sounds like hes using each day.. is he? How much is spending a week?
Is he out in the pub till 11 each night or working?
Plus he wont ever stop unless he really wants to.