Unfortunately, MISDIAGNOSIS is not uncommon. Having worked with individuals with ADHD for more than 30 years. I frequently saw the following:

• Preschool and elementary school aged boys who were fidgety, unable to concentrate or focus, and have behavioral problems were quickly diagnosed with ADHD and frequently given medication. Sometimes this was an accurate diagnosis, and medication was often the immediate answer. There seemed to be no exploration of family dynamics, learning disabilities, or anxiety. 
• Girls often manifest ADHD symptoms differently than boys. Another type of ADHD is called inattentiveness. Forgetfulness and losing things, daydreaming, and zoning out, trouble following instructions and completing tasks are just some of the symptoms easily dismissed as they are more difficult to diagnose.
• Many adults struggle with disorganization, poor time management, impulsivity, difficulty regulating emotions, perfectionism, and self-criticism. Often misdiagnosed as anxiety or depression, these challenges may stem from undiagnosed, ADHD, affecting relationships and careers.