My dd is just about 3.5. Really a good little talker, has plenty to say with very clear speech and can chat away. About two weeks ago she just started stammering out of the blue at the start of sentences, usually just the word 'I'. Now, two weeks on, it's at the start of pretty much every sentence, regardless of the first word. I cannot believe how suddenly it's developed and how poor it is now. Does anyone have any advice ? Thanks.