Try to look on the bright side. You and your new bride can enjoy the condo for many years to come. You like the condo--that's why you bought it, right? Try not to look at the bigger, nicer houses that are cheaper than your condo. Good Luck
The best advice I have for you at this point is to contact the Loss Mitigation Department of the bank that holds the mortgage. Despite what you think, most of these banks understand the situations surrounding this abrupt market shift. Find out if they have set up any programs for people in your situation. You may be surprised. Best of Luck!