Yes, consult an attorney (for real). It obligates you to NOTHING, but actually knowing how you might make out (something you really can't find out online) can help you make some decisions to prepare for whatever may come. A couple of things you should do are to start documenting his behavior and to make sure you are aware of your finances and that you have access to funds you might need.
FG is right, don't try to talk while he's under the influence. I'd also hold off on any further talk about divorce or separation until you are prepared.