Glad You're Aware!
Though I'm a verbal autistic, I grew up with parents who where not aware of it. Your daughter will have a much better life with your awareness.
Anxiety is the Main Driving Force
Autism creates massive anxiety. Adding inability to communicate drastically compounds the anxiety, reducing intellect until emotions level out again.
You're going to find one of the best things you can do for your daughter is find the right kind of cannabis for her. This may take time, depending on the legislation in your area. You'll be amazed at the increase in life quality for her, simply through the reduction of anxiety.
Thanks @thecleangame that is so nice of you to say, I mean I try but always nice to hear it from someone who understands. Anxiety is a constant issue in our house, that is why we tend to not go out much as a family to try and reduce the stress on the kids.
My kids are my world and I would do anything for them, it is hard but parenting is never easy. Unfortunately in Australia we are only just now looking into starting medical marijuana trials but only in severe cases mostly in children with epilepsy. I truly hope they legalise it here as I have seen evidence of what it can do for people with parkinson's I wonder how it affects autistic peoples stimming?
Sanity is coming
Many nations have agreements with the USA to not allow cannabis use. The USA is about to drop that in their own country, I highly doubt they'll be enforcing it on others.
You have to be here to understand what it's like in Colorado USA. Times are changing fast.
I think things are changing in terms of acceptance of cannabis and medical benefits. It is not a cure-all, but it does seem to help many people for a variety of things. I don't know if there have been any medical trials related to stimming and marijuana use, but this story was really interesting that talks about cannabis and epilepsy.
http://m.huffpost.com/us/entry/3734283#slide=887981