Closing Sucks

That's right, it sucks. The mortgage company got our would-be-house appraised and APPARENTLY the house is worth about $140 000 less than what we were prepared to pay for it. Whaaaa??? Funny thing is, the seller got the house appraised about 100 days ago, and the house is APPARENTLY worth $30 000 more than what we were going to pay. A $170 000 discrepancy between appraisals is kind of a big deal. We have an extension on the closing date so we can get the place appraised again (if we decide to). Fun fun. I know that I am a grown up and that I can handle responsibility, but I really don't know what I'm doing. Ever.