Can other people always detect ADHD?

My doctor gave me ADHD medication but never diagnosed me. I'm going crazy because I don't know what's wrong with me. I'm going back to the doctor in two weeks. Even though people don't think there's anything wrong with me, I see something wrong with me. I have never been diagnosed with ADHD before. But why is the doctor prescribing ADHD medication for me?
Can other people always detect ADHD?
Can other people always detect ADHD?
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