See a doctor and try it out in a safe dosage. If you find it helps, great! If not, well, maybe something else will work. Or perhaps you're just quirky.
It's hard to tell sometimes :)
There was a comedian who said something along the lines of: "I got got glasses the other day, and it shocked me. How could instantly improved eye sight not be at the top of everyone's To Do list?!" So when people talk about medication like it's a debate, I get confused. How could instantly improved mood and cognition not be at the top of everyone's list? (I'm a hyprocrite in that respect, but I'm just onery and enjoy the struggle.) If you don't want it, but the medicine helps, work your way off it slowly enough that you train your body to compensate (a number of people have told me that it's geometric: you can cut a third, then another third, then another until finally it's a negligible amount, but linearly tends to give poorer results).
But most importantly: do what improves your life. I wear glasses, and I've never felt shame for it. No reason to feel bad about a biochemical imbalance - that's even more complicated!
Even though it's for parents of children with ADHD it makes it clear with good examples what they're dealing with. Also worth keeping in mind that the disorder is different for adults in some ways.