My 3.9 year old son suddenly began stuttering 7 weeks ago. Literally overnight, he just woke up one morning with it, having always been a great little talker. We have had no upset or stress that could have caused it. Initially it was an ordinary repetition stutter and wasn't so bad. Then it almost went away and then came back but it had changed. It's now developed into a 'block' where he pauses and takes big audible breaths for upto 10 seconds before eventually the sentence comes out nice and smooth. He opens his mouth quite wide and his face contorts a bit and to be honest it looks awful, it's breaking my heart to see and hear him like this. It's only been a week since it has become this bad, and the block happens before I wold say 50% or more of all his sentences. I am going out of my mind with worry now, seeing the doctor Monday and SLT Tuesday. I am following all the advice to not let him see I am worried, to give him time and basically just carry on as normal but am finding it so hard as I am wracked with worry. The 'block' seems to be unusual, anybody else had this?