J.C.
You are in a school district. The district you live in is the one you belong to. You pay taxes to them- you qualify for their services.
My son was also speech-delayed. Understood everything you told him, just couldn't talk. Go to the elem. school that he belongs to and tell them you want him tested for speech. (I can't believe they didn't do this to begin w/in Pre-K) They will then determine what type of help he qualifies for and place him appropriately.
If you request testing they HAVE to do it. There is a timeline and if they don't do it within a certain amount of time they are out of compliance. Everything is free.
Good Luck!