EustaciaVye
"I dont want her getting her hopes up for an easy solution because I know there isnt going to be one." I am sure you know autism presents very differently in girls to boys. My girl is not typical which is why (probably) it took to 13 to get a diagnosis.
Also, in one sense, whether she gets a formal diagnosis or not I think you can help your dd (as I am sure you do) with all the normal stuff of self esteem, (being different is OK - and more than OK it is great, it is her, even if sometimes it is hard), doing what works (not having too high expectations on things that are hard while also encouraging), cutting out things that make life difficult (bright lights, crowds, loud noises, stress, etc, not all of them but the ones that work for you.)
Some things that helped, I think, - ear defenders, reminders where needed for stuff in the early days, not putting on pressure re school work, allowing for quirkiness (room decoration), not stressing re cleaning the room (endless task that lead no where and now at 14 she has actually started tidying and decorating of her own free will) and we also went with things (sports etc) for a short time, even though she lost interest quickly.
I don't know if this is teaching your grandma to suck eggs so feel free to ignore.
PS - I also had to bite my tongue a bit (A LOT) and allow her freedom to make mistakes because negative words sometimes led to a meltdown!