Flamable: Addict H/Finances... (very long)

So I know that this is probably going to get a lot of heated replies and what not but I am really looking for some advice and help. And by advice and help I mean something other than, "divorce him."

My H is an admitted cocaine addict and has been spending a lot of money on it. We recently started our own business that he runs by himself and with the extra income we should be able to pay all our bills, save some, etc. But right now we're overdrawn on our bank account on a regular basis. I am currently in a treatment program for a deferred DUI and know what it's like to be an addict, etc. So I understand that he's not doing this to hurt me, etc. But I'm trying to figure out a way to protect myself and our unborn child financially. Obviously there are a lot of other considerations as well but right now I'd like to focus on being able to pay my bills, put gas in my car, and buy groceries.

We currently have a joint checking account that we both use for everything. Right now this account allows you to basically be hundreds of dollars overdrawn. I'm pretty sure in order to get that feature removed we'd both have to sign off on it since we're both on the account. I don't know that he'd be willing to do that.

I'm currently trying to get an appointment with a substance abuse counselor at a local treatment center who is also does couples counseling. He has said that he was willing to do this. In the mean time, what should I do? Should I get myself a personal checking account so that I can control where the money goes? What do I do about his paycheck which I need to be able to pay all of our bills?

Sorry this is really long and drawn out. I'm scared at what everyone will say but am really looking for outside input. Also, I will be gone for lunch so will not be back to answer questions for an hour or so. Please be kind. I realize how this whole thing looks and am already feeling bad enough about it as it is.