I am hopeful that this will be resolved without further ado, but if you do run into a wall, these folks might be able to help:
http://www.patientadvocate.org/index.php
I've been down this road. It was a long time ago, and unlike your situation, it was entirely my own fault, but I know how terrifying it can be. I hope that your insurance company will do the right thing and reinstate you immediately.