In such case how to do to get favor of 2 or 3 months Chinese visa?

I am a foreigners, graduated since july in China. I married with my U.S. Citizen man last year 2014 in PRC. Currently preparing my U.S. visa application, my Chinese entry will expire before to complete my U.S. entry permit application. And I couldn't leave because we thought that things would be fast and get my U.S. entry permit before my Chinese one expire which is a Chinese student type. According to the information from the U.S. Embassy everything will be done from 2 to 3 months. thank you for your help soon as possible.