check out the website wife.org and start making some financial plans. Check and make sure H isn't hiding money in some secret account somewhere. Be proactive, not reactive. Think creatively. Could you get a roommate to help with the bills? Sell the house and move to a less expensive home? Go home to fanily for a while? Change careers or ask for a raise?
Maybe you should wait until the next set of paychecks come in, then move that cash before you bust H? Or start saving a secret stash of cash from the grocery money? Or just start stocking up on canned foods? Figure out a way to get some small buffer for yourself.