I found out I had ADHD when I started really struggling and getting behind all of my responsibilities and was irrationally angry, agitated and hateful every waking moment of my life. Learning I had ADHD was a relief, but at the same time I feel awful knowing how we're treated.
I don't really deal with ADHD with some kind of routine. It just doesn't work. If I can force myself to work and my mind springs into action, that's great. If it doesn't, I'll try Modafinil or Nicotine. But otherwise, I just go with the waves. There isn't much to do, really.
In regards of relating to you, mood swings for me include spontaneous obsessions towards a subject. Hyperfixation and hyperfocusing on something. Obviously it had its benefits, but I've also been forced by my mind to do something that's was not really important at that time. Negative emotions are mostly constant rumination and intrusive thoughts, although those aren't a problem if I'm obsessing over something that makes me happy. I'm not particularly negative, but I prefer to have something to do if I can, otherwise I'm always stuck in my mind going over imaginary scenarios and ideas. I am also very sensitive to sound, especially. The house can burn down if I am hyperfocusing on something, I wouldn't even feel the skin peeling off of me. But if I am trying to focus on something that must be done, and you even breathe in the same room as me, I will proceed to fantasize about choking you to death.
My short-term memory can often times be peanuts. I frequently get mini panic attacks and check my pockets if I still have my phone and wallet with me.
On the topic of education, I have been traumatized by teachers and my parents. I couldn't even look through a math notebook without getting sick in the stomach. I still can't.
I also got quite bad anxiety from all the trauma and when I'm stressed I have double the constant mind noise. I'm always have a constant monologue with myself in the second person.