Any advice would be appreciated as I've convinced myself something is drastically wrong :(
My son will be 2 in November and isn't speaking, he has no words just a lot of humming when he's excited or general incoherant babble or yelling (but not in a tantrum kind of way). He'll make sounds like 'b' or 'mmmm' but not say baba, he doesn't say mama or dada (although when he cries it sounds like he's crying mama but its not very clear). We had his hearing checked at 10 months (and he passed the exams) as he had started to babble at 6 months and then fell quiet for a long time, he wouldn't respond to his name or any loud noises, he just sat there in his own little world and didn't engage with us unless we came to him. He has been referral off to speech and language therapy and we are awaiting an appointment, but as time goes on and the harder we try with him there is STILL no improvement in his speech, and its got me watching for other traits now. He does communicate with basic needs, like he'll bring us his empty juice cup if he wants more, or his megablocks bag if he wants the zipper open, but again this is limited. He will engage with us if we are doing something he likes, but if he has initiated play by himself he's very hard to engage with. He wont use shape sorters, build his blocks or use toys as they are to be used, instead he will take them one by one out of the bag, or puzzle and group them together on the floor or sofa, not by colour or anything specific just in a group. He has little stacking pots which he will also group together and sometimes will try and put them back together but not stack them, he will let us do it though. If we tidy his toys away he doesn't get upset or annoyed, he is generally a very placid and pleasant child but we can see the frustration sometimes when something displeases him but he can't tell us what it is.
Apologies for the long winded post but I really need advice or reassurance. The health visitor is only concerned with his speech and doesn't seem to find any other abnormalities but it was a brief interview.