R.
There's no need to worry! Your child is eligible to go through the case study process. With his needs, it's fairly certain he'll qualify for special education services and in that case, CPS will place him. You really don't have to worry about doing the leg work yourself. Once he has an IEP (individual education plan), he'll be serviced. Has no one in early ed explained this process to you? It should be pretty clear cut when it comes to children with disabilities.
Good luck!