headoflife

I am sure this is a dumb question, but I have a ticket booked, on AA, from SEA to ORD, and now I need to get to Green Bay. AA is 30K points that day, but I see a flight on UA that is only 10K. I am concerned I will not have time to get my bags from the AA flight, and get them checked to the UA flight. It is only about 90 minutes between, and I have to check a bag. Is there any way to get the bags checked through to Green Bay? Thanks!