My 3 three year old started when he was two. Just wondering if anyone had a lo start it at a younger age? i have some concerns with my 16 month old but wondering if i should wait it out or call about him now.

Basically D NEVER babbled or made noise as a infant. it was weird. We think that he was just a quiet baby, his pedi agreed but it always had me worried. Now at 16 months he babbles but only has 3 words. His receptive language is good (at least to me but not as far as his bro was at his age!) I have my concerns because he seems to be following in his brothers footsteps with speech (i originally wanted to get P evaluated at 18 months but his dr said he was fine!) So now that D is 16 months, i am wondering if i should call. Can they help him being this young?