Speech Delay

Well Keaton will be 19 months old exactly tomorrow and he has YET to say a word...actually he does say "car" but that is IT! Of course I'm freaking out that something is really wrong. All of Keaton's friends his age are talking up a storm! Keaton does not even say mama or dada. His 18 month check-up wasn't the best when I mentioned to the doctor that he is not talking. He told me that he is concerned and gave me information and the phone number for Early Intervention. Immediately I start thinking all these bad thoughts...Am I a terrible mom? What did I do wrong? Do I not "teach" him enough? Did I make a bad decision to not put him in daycare? I can't help but feel that this is my fault. I spend so much time with him everyday reading books, putting in baby enstein videos as much as I can, etc. We go to "Rhyme Time" at the library every week to be around other kids and to learn a variety of things. Anyway, I made the call to Early Intervention and I'm awaiting the call from our Service Coordinator for a therapist to come out and do an intake, followed by an evaluation. We shall see what this brings.