Ideally it would have been nice if the two of you would have agreed on a financial strategy for the marriage. From what you described it sounds like when it came to finances your marriage was more of a (You & Me) and less of a (Us & We) approach. No joint savings or investments. It's always smart to at least have life insurance policies on one another.
However that may be water under the bridge at this point. It's still a good idea to meet with a financial advisor to garner some suggestions. There really is no magic bullet. One must spend less than what they earn in order to have savings. We either find ways to earn more money or we find ways to downsize our expenses. Maybe your husband can start an online business from home even if it's selling things via eBay or Amazon. If he has a skill others might be interested in acquiring he could put together an eBook and self-publish. I read about one guy who sold 1 million copies of his eBook at 99 cents each on Amazon within a 7 month period.
It's been said with every adversity comes an opportunity. You can approach a problem as if it were a puzzle you're trying to solve. Don't focus on the problem, focus on the solution. Have fun coming up with new ideas and new ways to get ahead. Read books about others who were in a similar situation and prospered. It's also been said "Success leaves clues". If you model or follow someone's recipe you should get similar results. "Life is what you make it" - Best of luck!