It does sound similar to ADHD symptoms.
When you say none of this bothered you as a child - I have (diagnosed) ADHD and if I look back I can see signs in childhood, but they are more subtle.
For example I've always had a chatterbox brain/always had a song stuck in my head, this isn't something that had ever bothered me, it just seemed normal, but for example I remember being surprised, as a teenager, to realise that most people DON'T constantly have a song playing in their head and when they are annoyed by it, it's because apparently it's annoying to have a song stuck in your head at all (I always have one 24/7 and only get annoyed when it's an annoying song). I used to have a very vivid imagination and could daydream for days.
I don't remember ANY issues with focus and concentration, in fact I'm very envious of younger me and want to figure out how I can get that back, but I remember doing a quiz in a book/magazine once and one of the questions was something like:
When you have a task to do, when do you do it?
A: As soon as possible
B: (something in the middle)
C: I put it off for as long as humanly possible and probably won't even do it unless someone is standing over me threatening terrible consequences.
And I remember finding the third answer so hilariously descriptive of me that I immediately went to show my mum, who also laughed and agreed that it sounded like me.
I don't actually remember what on earth I could possibly have been putting off - but I remember a couple of arguments over homework and violin practice. And if I think back, my room was literally a pile of unfinished art projects and little paper creations. It was SO messy. And I would be reading usually about 2-4 books at once (I still read multiple books concurrently) which again I didn't realise was unusual.
I don't remember struggling with things like tooth brushing and showering, though I have as an adult. But - why would I have struggled with those things as a child? I didn't have to remember to do them myself. My parents would tell me when to brush my teeth and have a bath.
I wasn't particularly anxious about social situations, but I was definitely "the weird kid" that always said the wrong thing, wore the wrong thing, did the wrong thing, and nobody wanted to be friends with me because of it.
There weren't a lot of outward, obviously ADHD signs for me as a child, and certainly not problems - because I had a happy childhood, I loved learning and loved school, my parents were loving and supportive and accepting, and I basically didn't HAVE any adult responsibilities - which are the bits that I struggle with, the boring, responsible, drudgery bits of adulthood. The only real problem I had was socially because I struggled to fit in, but I had my little group of friends and again, my mum signed me up to an activity where I met more people, and so it was OK.