I'm hesitant to answer this unless I had a full case history in front of me. I'm guessing there's a temporary order in place for child support? If so, it'll be overridden by the final order - however the interim orders often provide guidance for the court.
Child support can be modified at any time so long as YOU can prove a substantial change of circumstances. Rock Island County caselaw (And the 2nd district as a whole) will control what is "Substantial change," but generally items like 1) Employment, 2) lack thereof, 3) Sudden windfall of cash like the lotto, 4) re-marriage, etc usually count. Expect a barroom brawl from opposing counsel when you attempt to lessen/eliminate your support obligations.
Bottomline, if you feel you're getting taken to the cleaners, get a reputable family law attorney on board before you find yourself living in a van, down by the river.