Shell out the money and have her tested.
All I can say.
I didnt throw tantrums ( I was abnormally quiet as a child).
But each aspie/autie is different. She also has some traits like me as a child as well.
She might be nt, or aspie, or something else.
Got tested as an adult through the national autism association ( i believe thats what its called) and they gave me the name of specialist who tested me.
Sorry I dont remember the exact name of the organization, but thats one way to go.