If it's sold, the new owner would be contacting you directly. Have they done that?
If it's still in the foreclosure process, i.e. you received a notice of Trustee Sale, then contact an experienced realtor who works lots of short sales. They can work with you to negotiate with your lender. As you've been delinquent for so many months, I'm not confident you can now negotiate a loan modification but a short sale would be much better for you than a foreclosure. A loan modification and a short sale require the exact same paperwork. Get it prepared and to your loan servicer as soon as you can to ask.
The ultimate answer lies with the investor who owns your loan. There's no reason not to ask, and get the answer from the source and not just assume.
Please just get on the phone and call. Ignoring this only creates more stress.