DS is 3 next month. Has been talking since he 14/15 months old. His vocabulary is vast although his pronunciation isn't often clear and sometimes only myself or DP understands what he says.
For the last 6 weeks, he started to struggle getting the first couple of words out when speaking sentences. So, a lot of 'I I IIIII want do painting' for example. But over the last few days, it has become progressively worse. He will stammer on one worded answers, can start a sentence and stammer half way through or words come out in bits so helicopter becomes 'he he hel iii copt ttter'.
We haven't discussed it in front of him and if he gets really stuck to the point of silence, I say to slow down and try again. Not even sure if this is correct. 
If anyone has been in this position before, how do you handle it? Did you see a GP about referral to a SALT? Unsure of what to do :(