My experience in 2012 when I used my combo card (I went to Argentina for 2 months to visit family, etc) and on my return they sent me to secondary at Miami POE. I knew I was gonna be in secondary inspection because the customs officer himself warned me that he needed to do that since I was traveling on my AP. Anyways they let me in. So You should not have any trouble, at least expect secondary if anything. But You are very close to get news on your AOS so unless it's very urgent your trip I would wait a little until you get your GC.
