Ditto. Talk to your doctor. I've heard of people who have gotten medication from their doc to safely get through any withdrawals.
Are there really no other options to make sure your husband is taken care of while you get the help you need? I only ask because I always felt like I couldn't leave work, I couldn't leave my dog, that treatment just wasn't an option because I was too busy. Most situations can be covered with a little creativity and asking for help. It didn't come naturally to me and was kind of embarrassing actually to leave work and my other responsibilities behind while I got better but in the end it was absolutely the right thing to do.