DS is 23 months and speech delayed. HV weren't interested as he hasn't done his 2 year development check yet so I've got him into private speech therapy which initially felt promising but is now showing diminishing returns. The speech therapist didn't think he showed signs of autism but I've just done the MCHAT autism screening after reading a few threads on here and he's scored 8, which I understand is high risk. Where do I start now and what do I do?