Hi Jhuma,
Savana was diagnoised with 4q13.3 when she was 3 1/2 years old, she is now almost 6 years old. I think your childs breaking point is the closest I have seen to Savana's. Anyway, as far as developmentally Savana sat up by 8 months, crawled at 12 months. She said mama at 7 months, and dada at 8 months, but not many words after that, just some babbling. She started walking at 24 months. She was developmentally only a little behind on her receptive language, but very delayed in her expressive language. She had and used about 70 signs by age 3. She is talking now, but this only really started the last year and a half. She is a social butterfly, and always has been even without words. She has some learning difficulties. She is very easily distracted, and learns best one on one with alot of practice.
I hope this helps you. Please let me know if you have any questions, I will be happy to answer them,
Take care,
Amy