Echolalia and Aggressive Behavior in Toddler

Hi everyone,My son will be 3 at the beginning of September. We recently saw his pediatrician because he has begun to whittle down his foods to fruit, plain rice and pasta, occasionally some cereal. He has a ton of allergies so he's never been able to really eat pizza or anything. I was concerned about anemia, but after watching him a bit the pediatrician recommended I get him evaluated by Early Intervention (EI) for speech and behavior.Here are some of his particular patterns:Behavior: very possessive of me, hits and throws things at me and others if someone is talking to me, tantrums if I don't play the way he wants to play (e.g., if he hands me a block to build a tower, and then I hand him one saying it's his turn, he will knock the whole thing down, scream, throw and hit). Regarding other children: he plays and shares with a similarly aged cousin and our neighbor's kids. He sometimes interacts with new children, depending on where we are. The possessiveness of me is really, really bad though--he has hurt me numerous times.The pediatrician said he uses words but his usage and enunciation aren't where they should be. When EI performed the intake interview for an evaluation, I realized he has more speaking issues than I thought. I'm a SAHM, and I understand him, so I suppose I don't correct him as much (or perhaps as vigorously) as I should.That said, here are some oratory peculiarities:He exhibits both immediate and delayed echolalia (if I say "your turn" he says "your tturn " but if I say " my turn" he says "my turn"; he quotes lines from shows, books, etc several times a day), rarely uses pronouns (esp. First person), has limited knowledge of prepositions (knows up and down, will inverse open/close and on/off). He didn't call me mommy until 31 months (he called both my husband and me daddy).He knows many, many singular words, but predominantly nouns. He knew the alphabet by the time he was two, the phonics before 2.5, can count to 30 by rote and 20 by using objects. Can count backwards from 20. Knows all the shapes (including rhombuses, pentagon etc), colors, animals, foods.So my questions are thus:I find the echolalia most concerning due to the extent to which he does it and because he should be growing out of it, not getting worse. Does anyone know anything about echolalia here? Have your kids had it? Childhood educators know anything? What can I do to help? Does all of this tie together? When do you know it has gone beyond normal?I guess I'm also seeking support. I gave up a doctorate to be a SAHM with him (and my 3 month old) and am now wondering if I'm the one who caused this to happen. He stopped daycare at 17 months and wasn't like this back then.Thanks all. via /r/Parenting http://ift.tt/28Snzod