My 19 month old DS doesnt talk. At all. Not one single identifiable in context word.
He likes to baby babble occasionally. He says da da da but Its not in context. He's never said mum 
He points or makes a grunting noise when he wants something.
He seems to understand what I say, will follow simple instructions but he gives me nothing back 
He wont read with me. if I try to point things out in a book or ask him too he gets annoyed and tries to chuck the book. If I try to get him to point out body parts he wont do it.
He was a little slower then usual rolling, crawling ( he didn't, he skidded backwards round the floor on his back ! ) and walking ( 15 months)
My DH is convinced there is some sort of developmental delay. he thinks there is something "wrong with him". I then get very defensive and tell him babies develop at different rates but now I actually am worried.
I have seen the HV. She has referred him for a hearing test. He also appears to have one eye bigger then the other that droops slightly when he is tired so she has referred him for a sight test too.
He does have quite a temper. He is sociable with us but hates new people at first. he is very......meticulous with his toys. Everything in one place, cars must be in a certain box, goes mad if you try and put something else in etc. He also hides his car toys repeatedly under the sofa and behind the cushions until they are all gone ??????? EVERY DAY !!!
Should I be worried ? What could be wrong ??