As the other two said, first and foremost discuss things with your lender.
However, since you mentioned you can't afford it, there are some other steps you should take.
1. Your home is overpriced! If you have had the home on the market in Lawrenceville for 2 months and no bites, no feedback -- no answers, then you have it overpriced or under marketed.
2. If you can't adjust your price to market then ... You need an agent familiar with Short Sales (if you have no equity to go lower) or your situation. At the very least you need someone who teams up with investors or loss mitigators to help you navigate through the situation to avoid foreclosure (I do both!)
3. Take control of the situation. Who is in your corner? Are they providing the services they said? Who got you into this situation? Did you do this to yourself or was it the economy, divorce... ect. These factor into the things that a lender is willing to do. For example, if you just don't WANT to pay your bill, they will not work with you. However, if you were laid off, they might be able to work something out with you until you sell it.