If you trust your physician then you need to follow up with his advice. ADHD/ADD is a biological disorder, like Diabetes or Depression. It effects how he processes his world and behaves but if it is truly ADHD/ADD then he may need medication to correct the biological problem for a period of time. His brain is firing off at an amazing speed and he cannot control it. The thoughts and impulses just bounce around and around. Think how hard this may be for him.
I have a friend who took her son off all red dye 40, he acts better, another took her children off all wheat products, chocolate, all sugar, and dairy. They act differently. You know your child. Maybe he doesn't like school and just needs a longer adjustment period. Lots of kids get diagnosed at this age because teachers see multiple kids year after year and they are able to recognize the symptoms rather quickly.
How many more days are you and your husband going to be able to take off and stay at school? Consider your options, think about the advice of the doctor, think about the child's diet, put them in sports, look for information at your local library, get a second opinion if needed, medication isn't the worst thing that can happen to a child.
I refused to put my child on any medication because I thought it was bad. I blamed the teacher. I went to class to observe how JM acted. I told the teacher I couldn't pay attention to what she was doing because the room was too busy. There were posters on every surface, stuff on every counter top, I couldn't even tell you what the teacher was doing the whole time I was there. She put JM in a corner facing in and took all the stuff off the wall, it didn't help. JM dropped out of school at 15, works in menial jobs that no one else wants to do, is not able to pass entrance level tests to attend even a junior college because she never was able to learn how to process getting the information from the page into her brain. When she finally went to live with her dad because I couldn't cope anymore he put her in Soccer, both indoor and outdoor year round. Her father was diagnosed with Adult ADHD several years ago and has been able to make changes in his life and has finally held down the same job for 9 years, he had 18 jobs in the 4 years we were married. He makes good money and enjoys many time consuming hobbies and interests that he wasn't able to before.
Hope this helps. I feel that my non action when JM was a child has had long term effects that are detrimental to her adult life. I wish I had taken the time to think about my options and made different choices. Medication may still not have been my choice but I would like to think that hindsight is 20/20 and I would have made better choices.
G