Unless your pediatrician is a developmental pediatrician, I would suggest Early Intervention evaluate your son (I'd request a psychologist and a speech therapist). We weren't sure if our son would end up on the autism spectrum because he's so affectionate (though his eye contact was fleeting), but sure enough, he has an autism diagnosis (determined by the Autism Diagnostic Observation Schedule). It was a long process (about a year) until we received the diagnosis, and we have seen MANY people in that time. More significantly though, my son has processing disorders which has made communication harder for him. Every specialist who observed him said the same thing (and they were all in different buildings, different medical groups, etc.) which is that he clearly has a lot going on in his brain, but he can't get it out.He has been going to occupational and speech therapies to help him with his processing issues. He's been in OT for 7 months and Speech for almost 5 months. This time last year, my son (3 at the time) could not say anything original. He repeated phrases he had heard from people or from stories we read. Because of his improvements thanks to his therapies, he's going to be in a mainstream preschool this fall. He talks to us about what he's feeling, he asks us how we're feeling, and while we aren't totally conversational yet, we are definitely getting there. When we read stories, he can tell me what happened, who the characters are, and is growing an impressive vocabulary to boot!I saw that your originally posted over 3 weeks ago, so I'm not sure if you'll see it. Nonetheless, I hope you can find the help and answers you seek, and that your son is able to find his voice again. Best wishes!