My parents insisted I didn’t have ADHD as a kid because I had the same symptoms they had as kids and their parents just told them it was normal. Turns out ADHD has a genetic component and this is pretty common. You can find screeners online, but your best bet is to just get tested by a psychiatrist specifically. They’re the ones who can diagnose you and prescribe you proper medication. If you’re underage, this will likely require a hard conversation with your parents and if you’re in the US at least, you may need a referral from your primary care provider.
A psychiatrist will rule out differential diagnoses (things that present similarly and could explain your symptoms for other reasons) and they’ll also screen for comorbidities (other disorders you may have on top of ADHD) that could be made worse with front line ADHD medications.
This is just masking and it’s exhausting. It’s so much more fun and relaxing to spend time with my ADHD friends