Yes, the extra water could soften the dirt enough to allow the vibrations to telegraph, plus softening the ground under the footers. In your harsh winters you go through a lot of 'heaving' of the ground and the water helps it to settle down to original. You will probably be OK by June 1, which would be a good time to put it on the market. Many people move when school lets out so they can be situated when it begins again.
I wish you the very best on your sale, if that's what you decide to do.