next day get I-131..hope!!!!

Andbody experienced or experiencinggggg...pls help on it.
If I file I-485 package (based on marriage with US citizen) and I-131 tomorrow, how long I can get the I-131 approved? I am F-1 under OPT status now.
I need to go back China resally urgent.
Thanks!

Or any suggestion...which will be fast way to go back China for my status now.