How I do go about getting my mortgage company to let me out of my mortgage?

I can't afford my house anymore. I moved to another state (my brother is staying at my house for now and he doesnt have money either). My mom sells real estate, and she said i should be able to apply for a hardship letter. I lost my job 11 months ago and am trying to catch up on my bills. I'm also trying to save my credit. Any suggestions would be greatly appreciated.