Same boat, except I was diagnosed before hand. I was scrolling one night and adhd content started started to appear where people were talking about how it impacted their lives (albeit via stupid lists). It actually pinpointed a lot of behaviours I exhibited and put meaning to them. I was sceptical at first but started to see more and more of the same behaviours being highlighted, so I wrote them down and took them back to my shrink, who sat down and went thru them with me and we started to work through them. Was actually quite helpful.