Hi I bought a book called ‘Delivered from Distraction’ by Edward Hallowell before I was diagnosed. It has a large but really good adhd symptoms questionnaire in it. This helped me to realise yes I do have ADHD regardless of what others say who can be dismissive. There is definitely a prejudice in society that adults don’t have ADHD!
Try some formal questionnaires. And if you score highly go for a formal diagnosis if you choose. Nothing to be ashamed of and it might change your life.