My son is nearly four and has had very clear speech and a wide vocabulary from an early age. Recently we’ve noticed that he is repeating the last sound of certain types of word (kick ck ck ck, cat t t t) and doesn’t seem to be aware he is doing it. I’ve had a google (bad idea I know!) and it seems like an atypical disfluency, word final disfluency, and possibly related to ADHD, autism or Tourette’s. He does exhibit some other signs that he may be ASD in a very minor way (struggles with group activities, poor concentration/fixation). Is it worth requesting a SALT referral at this age or worth waiting until he starts school in September to see what the school think?