Like the title says, anyone who has a LO with a stutter that is not just developmental, but a true stutter?

LO just turned 3 and has been exhibiting a stutter with secondary characteristics (prolonged eye blinking, grimacing, body tension, blocks, etc) since December. It came on suddenly and progressed very quickly. He’s been receiving private speech therapy since July and recently qualified for extra services through our local school district that will start in August.

We have seen a neurologist and gotten an EEG which showed no seizure activity and we have a followup next month. The neurologist said that if the stuttering is as frequent and severe as it was in February that he would like to order an MRI to see if there are any underlying causes for the stuttering.

Anyway, anyone with experience, advice?