The information in this post can help you locate your cat. Try putting dirty laundry with your scent on it, and/or cat's bed outside to lure her home. You can also put smelly food that she likes outside, but you have to closely monitor this.
If you haven't, please report her missing right away at local police station, Chicago animal care, all shelters and veterinary clinics in and around your area. It's best to go in person if possible. Check back with shelters daily since some only hold strays for a few days. Let neighbors know that he’s missing and ask them to check their cameras, yards, sheds, garages, any potential hiding place. Put up flyers everywhere! I hope she's home soon!