The teacher and school didn't want to pay for the things he would need in school like OT, Speech, and so much more. My youngest was dianosed finally when he was 6 almost 7. The school he was going to pulled the same bs although my first son that I gave up had autism too and I knew my baby had it. Finally we took him to someone who does the testing and he said it is very clear your son has this. He has been diagnosed 5 times after and what really chaps my butt is that the school was dumb enough to pull this. The school also didn't feel he needed special ed, every day he'd have a tantrum and they had to have me pick him up. We live in another state and he gets all the things he needs from his doctor and school, and a few other things that we have him in. You will find a lot of us probably went through this. Schools most of the time will do this because they don't want to pay . My brain is fried but alot of states have a resource center that helps with children (or if you get your child in before 21) adults. They really help alot. I'd really look into it. They can go to the school with you and make sure your son is getting what he needs. Look into it.