I assume you discussed quitting with your husband?
If he is taking your paycheck out of your joint account or from your purse, you really need to consider setting up some boundaries so that he can't use it on drugs. Separate accounts, hiding cash, doing the shopping/bill paying yourself, etc. You are married, so it's tricky, but you really need to sit down and tell him you want to quit and try to agree to cut off the source of the drugs. Maybe if he doesn't have free access to the means to buy drugs it will help?
I really don't know your full situation, and I'm sure it is very difficult. You posted that you were thinking about checking out a meeting, were you able to?