IL - Can your lawyer add to divorce decree w/o your knowledge regarding collecting fees from you?

My divorce was final about 2 weeks ago and before court my lawyer sent me a final copy. I noticed a few mistakes and was told they would be fixed but never received a final copy until after the divorce was final. I saw that the changes I requested weren't made and he added a clause requesting permission from the judge to have the right to sue me if I'm not paid in full within the next 30 days. They verbally had told me several times as long as I continued to keep making payments I'd be ok since this case has cost over $15,000 and everything has been paid except about $2,500-$3,000 from this last court date. I'm a single mom getting no support only working part time while I'm back in school so I don't have this money upfront but I can keep making payments no problem. Anyways, my real question is do they have the legal right to add a clause like this into my final divorce decree without my prior knowledge? I live in Illinois.