If your daughter is still in school, I would ask the school to evaluate her for ADHD. When my son was tested there was a form with many many questions that was filled out by myself, my son, quite a few of his teachers, the school social worker and then compared, rated, and passed onto his pediatrician. He scored very high for ADHD. I cannot remember what this form was called, but I guess it's what they use to evaluate and diagnose ADHD in our school systems.
Some doctors believe that if you place a child on adhd medications and they improve, it's adhd, if not, then it isn't because they say adhd medications won't do a thing for someone who doesn't have it. I didn't really go that route, but I've hard some do.