Strongly suspect I do but the inattentive type rather than the "H. Still debating if I should go and get officially diagnosed or if/how it will help. Can only manage life with extensive use of lists, everything last minute, constant need for dopamine hits to get anything done, always starting a million and one things but not finishing, hyperfocuses which when they're gone, they're gone, chronically untidy (again can only be managed by lists), always losing things, procrastination, "work hard but not smart"... massive issues with sensitivity to noise in particular, but when I was a child, I was hypersensitive to every little thing. Never had any problems with making and keeping friends (though am very one to one rather than 'group'), but lots of problems with romantic relationships as am always very hot or very cold- there's a dopamine element there too-, so scared because I don't want to hurt anyone (which I have, badly) nor be hurt (which I have, badly), and I don't deal with either very well.
I think I've developed strategies for managing it to "mostly normality" day to day without realising that's what I was doing, but I've always known I seemed to be wired a little different (have two relatives very similar, which is another thing) and some "normal" things seemed SO much harder for me than other people. It can all fall apart very easily too. But like others, my creativity and capacity for generating ideas is good, I seem to see patterns and links between ideas more easily than others around me and at work etc, so can come up with good solutions. It also helps to be fairly academic, but I think that masks some of the problems too.
When I read about the symptoms of inattentive ADHD (I'm in my 50s) which I was looking at about one older relative, rather than myself, a light went on, honestly. I cried, because I too fitted almost everything, especially the dopamine thing. It explained so many things about me, but I'm so sad that things could have been so different if I'd known or it had been recognised. I just thought I was lazy and a bit weird.