The best thing to do is contact the lender you have the loan through and explain the situation and try to set up some sort of payment plan. If you are behind for a very long time and can no longer afford the mortgage payments you can look at other options like selling in to pay off the loan. If the current market does not offer a price that would cover the loan amount then you may have to do a short sale. You can always talk to your loan officer and see what other options you may have, including refinancing. It all depends on what you would like to do in the end. If you want to stay with the property, want to sell it. or even renting the property may be an option if it covers the mortgage.