Well, ADHD is for life. It doesn't go away, you just learn how to cope with it. So my first question is what kind of a doc is your new doctor and how did he evaluate her?
Current clinical practices require that the symptoms be present for 6 or more months and that they occur in two different places. In other words, the doctor can not just examine someone once in their office and make a decision.
Hopefully, you did more for your daughter then just take her off the meds. Like give her strategies to cope with ADHD. Like start 504 plans for help in schools, etc?