I am so sorry.............I wish I could tell you something better.........you were put in a difficult spot by someone you trusted to look out for your best interest...........as many on this forum can definately relate to........
you can also speak to the attorney on our home page about short sale or walking away and see if they may have some better strategies on what you may be able to do............here is the link and the consultation is free........
Dont-walk-away | Home Mortgage | Protect Your Home & Mortgage With Loan Safe