Number one go after that low life attorney of yours. 2nd appeal this outrageous ruling and bring it before another judge. Than heres the important part while it looks really bad right now wait until after the appeal. You may not get everything you want but if the house is in your name and there is a prenup as you said than you will be able to get it back. Plus a attorney that actually does his job should have no problem getting the house at least for you.
Try not to be down as that lets your exwife win easier. And don't you dare give up!!!