Daycare Waitlist / Rec Chicago

I'm now 16 weeks pregnant. When should we start waitlisting for daycare?

We work near the Loop and Des Plaines; looking to buy in Skokie, Evanston or Lincoln Square.

We don't know where we will find a home yet. But also don't want to break our banks finding a daycare. I have 3 months of maternity leave, so by March we will need to start infant care.

Any recommendations would be greatly appreciated