I'm mainly checking that I'm right to not be worried.
He is very verbal - speech came on at a tremendous rate at about 21 months, and now at 25 months he has a wide vocabulary and is talking in complete and quite complex sentences. So far so good!
However in the last week he has started to stammer quite badly - he will get stuck on a word (which he knows) and make an 'ah ah ah' noise until someone suggests a word, or he gives up, looks sad and says 'me not talking now'.
Is this normal? I presume I should just keep an eye on it, but looking for some opinions