how is her speech? can she talk and carry a conversation with her friends (girls of her age)? does she have friends? maybe she has autism or maybe not. if she has good conversation and social skills with her peers and has two or three close friends of her age, she probably does not have autism. You do need to get her evaluated by a child psychologist or child development doctor. Maybe she has a learning disability and she is overwhelmed with her struggle. Get her the help that she needs. Are you in Northern California? If you are in the Bay Area, I can refer you to someone. Good luck
Have you talked to your pediatrician? Your daughter's Dr. can refer you to a child psychologist or a team of therapists to evaluate your daughter. Also, try the website
www.autismspeaks.org
they have lists of signs and advice.