J.W.
What about this place: www.vnafoxvalley.com/? It's a bit far for you, but they might take the medical card and would probably take you regardless of how far along you are.
Have you called the IL Health Care Benefits Helpline to ask which ob-gyns take the card? Here's the info: Health Care Benefits Helpline - (866) 468-7543 from http://www.dhs.state.il.us/page.aspx?item=44574.
I went to two different ob-gyns in the Aurora area and was very happy with both: Dr. Harmon at Fox Valley Women & Children's Health Services (http://www.fvwchp.com/) and Dr. Motycka at Dreyer (http://www.dreyermed.com/component/doctorfinder/?view=doc...(
Hope that helps!