This is the first time I've posted about this, so please be gentle, it all feels very raw.
Am just back from SALT with DS2 (2.11) & she is recommending he be referred to ADOS as she suspects he has autism. I am gutted. I always knew he was 'different' but I put it down mainly to a language delay plus quirkiness.
He was referred to SALT at 2.0, at my request. He had glue ear for at least 8 months in the last year, too. He had 10 words when referred, now has about 40. He has seen 2 different SALT, both have said he has made more than the expected amount of progress between sessions (last lot finished in October).
The other concern I have had about him in the past is that he loves doors and used to sit for 5-10 mins opening & closing the doors on a toy kitchen, plus he likes to make sure that lids are put on things when finished. But this has become a lot less over the last 6 months or so, to the extent that he only really does it when tired now, although he does always have to make sure a door is shut. He can be taken away from doors/lids without more than a small squeak of protest.
Apparently, his language is about a year behind where it should be. SALT also said that although he has great eye contact & looks to both me & her for help, interest & reassurance etc that he was not relating to people how he should. Eg she was blowing bubbles & said 'ready, steady' about 10 times, he only said 'go' twice, she said this was not consistent enough. Also, she said his play skills are delayed - she had some toy animals out & he was not very interested, although did copy her a few times with noises & making them gallop etc. He has been in an awkward mood all day
Also, he does tend to shout, but can sit nicely when the situation requires it eg in groups or restaurants etc.
SALT was talking about schools & about specialist language units, but said he probably won't need a special school as he is very sociable & as he copies can obviously learn from others. She also said that he is doing everything she would expect, but from a younger child, so he may have a delay rather than a disorder. She also talked about DC having a diagnosis when young & then outgrowing it.
DH does not think that DS has autism, just that he is quite delayed. I don't know what to think. I am just sad for my beautiful boy. I don't want him to have autism, but then I feel ashamed for feeling like that 
Sorry if this post is jumbled, I just wanted to get my feelings out & I thought you guys would be well-placed to understand (hopefully).