Quick test: Do you have friends with ADHD?

More than 1? Ask them if they think you have ADHD.
More than 50% of your friends? You have ADHD.

It’s a scarily accurate meme that ADHD folks flock together.

For a more considered approach, I’d recommend getting started here: https://www.psychologytoday.com/us/tests/health/adhdattention-deficit-disorder-test

It’s non-comprehensive, but doesn’t require a login or email to see your results, and it gives you a starting point to talk to your doctor.

Depending on where you are in the world and how badly this is impacting you or the state of your local health system, you may want to investigate alternative diagnosis options.
In the U.S., it was a 6-month wait for a traditional psychiatrist. I resorted to an online option as my ADHD discovery coincided with long covid and depression (I needed a quick turnaround before it impacted me professionally), but there are now some chain psychiatry operations that, well, I don’t like their business model, but they offer fast turnaround if you’re willing to be a part of the enshitification of yet another profession.

Editing to add: That’s more a pointed comment at myself than anyone else. My regular doctor was not really getting my depression meds right to the point it was becoming an emergency, so I wound up with a company called LifeStance. They’re the McDonalds of mental health providers.