My [28F] husband [30M] "came out" as autistic a month ago. Now our 2 year old son has been diagnosed. I'm upset.

Husband and I have been married for 5 years. During that time, I've noticed that he has a bit of a temper sometimes, but never suspected anything being douchy behavior.
Fast forward to a month ago, my husband tells me that he thinks he is on the autism spectrum, based on several tests he's taken online and message boards he's read. He has yet to get an official diagnosis...I do kind of keep pushing for that, in order to get him help, but he's putting it off for an unknown reason.
Now, yesterday, our 2 year old son was given a diagnosis of being on the spectrum, due to some poor communication/language skills and social behaviours.
I love my husband and son. I know that being autistic is not the worst thing in the world. It's not some horrible scary disease. But it does affect daily life. I am supportive of my husband and want him to feel good about himself and get help, but he keeps pushing me away. And honestly, I wish he had said something before now, maybe in the three years we were dating. He has suspected since before then. I wouldn't have left him, but I wish I had been prepared.
How should I be responding? How can I be sensitive in this situation while also saying what I need to say (if anything)?
TL;DR Husband thinks he's autistic, our son is for sure autistic. Mad at my husband for not telling me sooner, and scared for our future.


Source.