My son just turned 2 years old 3 weeks ago. He can count up to 15, he knows some of his ABCs, but doesn't talk much like other 2 year olds. The only words he says are popcorn, jump, go, Tata ( how he calls his grandpa), nana, no, and yes. That's all he can say and the rest is just gibberish talk that he does. When he wants something he doesn't say anything he just brags my hand or takes me to where he wants me to get something for him. My in laws told me he's suppose to talk a lot more now. Should I be worried? He's my first child and I try my best to teach him.