I'm so sorry that you are worried about your little guy. I have had 2 late talkers and one early talker. I have a 17mo right now who sounds just like your son. He comprehends a LOT. He will shake his head yes or no, but doesn't say very much. We have heard him trying to say a few words lately. but nothing too extrordinary.
My first two hardly said 5 words before their 2nd birthday. They were in daycare full time though, so I think that had a lot to do with it. Once my oldest started talking she never would be quiet. She is almost 7 now and quite the chatter box. She reads on a 4th grade level, and is pretty advanced. She never had any speach therapy or anything like that. She was just going to take her time.
My second was also a late talker like I said. He would grunt to get my attention and to try to tell me things. It was like living with a cave man
. We finally started signing with him because he was frustrated about not being able to communicate. We just made up our own signs and used them consistently. Like we had a sign for drink and for food. If I remember correctly he started talking not to long after that.
My 3rd was an early talker. She was saying momma at 8 months, and it just went from there. She has always be a
. I have always been at home with her full time, but I can't see where I did anything to make her talk so soon. Its just the way she is. Its neat to know what is going on in your 1yo mind though.
She is 3 now, and communicates very well.
I also have a 17mo as well. He started out grunting to get my attention and I was like...here we go again! He does comprehend a lot though. He will follow simple instructions. He says momma and dadadadad for dad. We have heard him say a few other words as well. I have a feeling he knows more than he is letting on
From what you said and from my experience I really wouldn't worry. You might try coming up with some signs if he is really frustrated. That might help the situation. It sounds like you are doing everything right....its just his personality. Hang in there. Pretty soon you will be posting and asking all of us how to get him to shut up.