Sounds like you got the ball rolling. Dont settle for first opinion.
Except for your last couple of posts you could be talking about anyone of my 2 boys the oldest now 5 and doing fine.
I had speech problems also linked to glue ear or something like that. Talked till 2 stopped till 4 when I had an op and making up for it eversince.
Your gut can often be the best judge but then sometimes our minds and thoughts run away with us.
I'll follow with interest
PDD NOS was what my baby sister was diagnosed with at age about 13 and a host of other things. I became carer for her when she was 11