At what age did your child show symptoms of ADHD vs. when did your child get diagnosed with ADHD?

My daughter is 3 and I am like 90% sure she has it based off of her behavior compared to other toddlers her age. We have a well visit scheduled for tomorrow and I’m going to push hard for an evaluation. A lot of my family is making me feel like I’m overreacting but we have been in a similar situation with her speech and I was completely right about her delay. I live in Ohio. And I’m hoping that if her doctor doesn’t agree to it that I can find an outside resource to take her to.