I have ADD, though that's not really a surprising diagnosis. I've never been able to focus quite well, but that's not JUST what ADD is. Currently I have 10 tabs open, all having to do with something that I was looking at, till I got distracted, and then looked at something else, but I might come back to it, so I leave the tabs open. That is what my brain is like.
Growing up, I always thought I was just stupid in math, that I didn't try hard enough. Homework that would take a normal person maybe 30 minutes would take me 3 hours. I would get so frustrated I would break down into tears because I couldn't understand it. Also, since math is very detail oriented, I was prone to making a lot of mistakes, because I didn't read the question properly, or I skipped a step, or missed a decimal point.
I of course did well in classes I was interested in, like English and Choir I could hyper-focus on those, and the other classes, my mom would hound me to get my homework done, because she is the same way, ADD runs in families.
Trying to listen to someone when another person is talking is like having two songs playing at the same time, it's a mess of sounds, and you would like to listen to both individually but you can't. The amount of times I have had to ask someone to repeat themselves is embarrassing.
Concentrating on something that isn't incredibly interesting is torture, boredom hurts, it feels like someone slamming my head against a wall while repeating "Find something to do!" over and over.
It's embarrassing but I couldn't remember any birthdays but my own for the longest time, I can barely remember my parents' birthdays', If I didn't get facebook reminders, I would forget everyone else's. I'm genuinely not trying to be rude, and I've tried to remember, but they just don't stick.
I am beyond messy, nothing is organized, at all. My rooms a mess, purse is a mess, book bag is a mess, when I had a locker that was a mess, anywhere I stay for a few days becomes a mess...And when I have to clean it, it gets overwhelming, so overwhelming that I don't know where to start. I can't just pick a spot and start cleaning from there. When I was little my mom used to have to take string, place it around the area, and have me clean just in that area, if that didn't happen, I would get overwhelmed and not be able to do anything.
I forget things all the time, it used to be worse when I was younger, but after years of forgetting things, I have a mental checklist that I go over and over before I leave the house...and I still forget things...I've even forgotten what I was saying, while I was saying it.
Also there's a "wonderful" thing called hyper-focus, where my brain will get stuck on something, it may be a band, a book, a character in a show, an activity like drawing or writing or pretty much anything and I will be able to think about almost nothing else. Which can be fun if I want to draw or write, but it can be annoying when it's the only thing I want to talk about. Which can get irritating for most people.
Also, today I have sat at the computer all day in an attempt to get my math homework done. It's been hours, and I haven't been able to even finish one section. I don't understand it and there are so many little details that I miss, and then the whole problem is screwed.
Also I have looked through at least 4 of my tabs while writing this, gotten up at least 5 times, and I've probably been writing this for about an hour...Yay...
TL;DR:
My brain is like the tabs on a computer, and I have at least 10 of them going on constantly...WOO.