My DS is 18 months and still has no words. Apart from “baa baa” when he wants us to sing his favourite song. I’m not even sure that counts as a word. He shows signs of understanding, will follow basic instructions (when he feels like it 😂). He’s very sociable and loves “talking” to everyone we meet, but while his little friends are saying lots of actual words he’s still yet to say anything. Should I be worried?