i'm starting to worry that my daughter is showing signs of autism, she is 28 months and only has about 4/5 words that she doesn't say well, doesn't play with other children in playgroup, doesn't always respond to her name, although I'm sure she can hear just fine. she likes to do what she wants to do and gets upset, often for no or little reason and can't be consoled. when playing with toys, she's more interested in parts or how its put together, any toy sets or toys of a similar type she arranges neatly. for the most part she seems happy, active, climbing on all furniture. does this sound like i should be concerned? any advice would be much appreciated