So sorry you are going thru this. I have't lived in Illinois in over 20 years so I can't help you there.
The alternative to Entocort is prednisone. It is VERY cheap, but there are alot of side effects that go along with it. The upside is that you start feeling better pretty quickly. How long til your next appointment? I know it's hard when you are suffering, but try eating a low residue diet til then, it's usually easier on the stomach and intestines. Also, if you aren't taking a multi vitamin, get some. Most people have absorption problems so any extra vitamins you can get in can only help. Try to drink gatorade or pedialyte. I'm not crazy about them, but through the years, I can tell when my body is needing those electrolytes. Rest as much as you can.
Everyone is different, and responds differently. I can only tell you what I find helps me when I'm getting really sick. Hang in there. Hope you get to feeling better soon!