I am planning to short sale my home in order to avoid foreclosure. I need to inform my tenants and perfer them move out during the sale.

My wife went through a serious medical problem and the insurance did not cover the cost of the medical bills. We were unable to pay our mortgage, now it is almost 60 days late. We are worried and facing a foreclosure. How can we avoid it? Can the lender help with a back pay or add the back pay on our existing loan or modify our loan??? Has anyone been in this situation, please advice. Thanks.