Drained,
Get your own account on Thursday morning the minute the bank's door opens.
Then withdraw what you need to live for the next two-three months out of the joint account and put it in your new account where YOU AND ONLY YOU can get to it.
You will need this to survive. That money will be gone soon, and you will have nothing. As half of your marriage partnership, you have a right to that money, and as someone who shares a joint account with an addict, if you don't separate it now to pay the utilities you could be facing a lot worse than turning your thermostat down.
And your husband? He will ALWAYS find more money for cocaine. Because that's what addicts do.
Protect yourself. No one is going to do this for you, and now is the time before it's all gone.
GL