Many individuals have both an ADHD and an autism diagnosis. It’s becoming increasingly common now that the latest DSM allows both diagnoses.
There’s a self-test here that can help you see if you’re on the right path: https://www.additudemag.com/screener-autism-spectrum-disorder-symptoms-test-adults/
But, ultimately, you don’t know unless you seek evaluation.
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism