My advice would be the exact same as Missy's. As long as your house isn't sold, or at least as long as that contingency isn't removed, it is a moot point. If you can remove that contingency, your Buyer's Agent will likely instruct you to do so with a re-negotiated sales price. If you can not, figure out what needs to be done to get your home sold, while simultaneously renegotiating.
Interesting situation. Wish you the best!