Mom guilt and having an ADHD kid

My son just got diagnosed ADHD. And I feel so guilty. Not because he has ADHD. But, the more I learn, the worse I feel. I’ve realized how many parental mistakes I’ve made. How my ways of discipline have most likely made it worse, that I unknowingly made him feel bad about something he can’t control. I never thought that getting frustrated and snappy because he misplaced his shoes or because I had to remind him or reinforce something a million times, would affect him the way it possibly has. All the times I just thought he was being bad and just not listening. But really, his brain just works differently than mine and he doesn’t know or understand. He didn’t know why he couldn’t keep up with things or why he couldn’t remember to do a simple task. I don’t know how it actually made him feel, he’s too young to explain. But, I know it didn’t help. I didn’t help. I know I didn’t know. But I wish I would have.