GET LEGAL ADVICE. We are not family law attorneys, Katie. You've been told by several posters to educate yourself on family law in your state, and yet you're still panicking and ill-informed.
Your husband is acting the way he is because he is WAYWARD. Unfortunately, YOU need to be the calm, cool and collected one now if you want to try to save your marriage. And even if you DON'T, you'll STILL need to be, so that you can defend your interests.