My son just turned 3, he has the same diagnosis, we have been through a solid year of speech therapy and ABA therapy, he also starts pre-school
( run and funded by the school district) in August. I am sure you are doing everything you can think of, what it comes down to is each child is different and finding what sparks his or her interest, we have been very fortunate, Alex adores Sesame Street, so honestly as much as some people are anti television it has been amazing for Alex, he will still repeat a lot of what he hears, snippets of songs, repeated sentences, but he is starting to put words of his own together too ( I think the term for the repeating is called echolalia) Alex likes books, but rarely likes them read to him, he prefers lots of pictures and having everything named, he also likes flashcards ( different I know, but whatever works) With his ABA therapy we have done things like line up 3 different colored cars and ask him to touch or point to the red one, etc. We do the same thing with different animals, Alex loved animals and before he could even say yes and no he would name animals and make animal sounds, from the therapists perspective I know they were excited, but it was hard for me knowing I had a two year old who could say Rhinocerus, but couldn't ask for more apple juice...I don't know how things go at your house, but I will say we used as many alternatives to giving Alex a way to communicate as possible. We used some baby signs and watched baby sighning times, this gave him more "words" for a long time he could sign things he could not say...we had a picture board for routines, we used a flip book with velcro pictures to help with what he wanted, outside play/ different food choices such as snacks, movies etc...anything we could take a picture of! We no longer use the signs although he still signs more occassionally when eating = ) We no longer use the picture charts...it was a God-send for diaper changes, Alex did not deal with changes in routines well...we dealt with a LOT of tantrums...when he was able to communicate his wants and needs more effectively we saw the tantrums subside. I didn't think it was possible that Alex would make this much progress, he even has started saying yes...it will happen for you too, its a lot of hard work, but the resluts? So worth it = ) I can see the light at the end of a trying year, for some it takes longer, we just started working on potty training, I expect it will take a while, but I approach everything with optimism...if you make it seem "fun" it won't be work ; ) If you want to ask anything or just talk, feel free to send me a private message. I cannot praise my son's therapists enough, they have helped us so much, never fear to ask the therapists if there is anything you could be doing in addition to the work they do, ours have always given us ideas = ) Lots of luck, it WILL come with time = ) Just your son's time, that was hard for me too!
Just so you know, the first few times Alex was tested he failed the M-CHAT, for a while due to his testing and his "quirks??" they were convinced he was Autistic, he is still "on the spectrum" but Autism was taken off the table as a diagnosis...you are doing the best you can by him, early intervention is so important!