Adhd help..

I know for sure my 8 year old son has adhd or add..or something.. I told the doctor and he said to wait until next school year to do the checklist because they only have like 2 weeks of a school left.. I feel like I can’t go through the summer with him like this.. I have 2 other kids and he’s like a handful by himself. When we’re in restaurants or grocery shopping, he’s so wild. I’m overwhelmed man..

Is there anything I can do?