@Angel23,
You sound like me.. I have ADHD (shocker haha)... Once treated my whole world changed. I was able to slow down, focus and become organized.
I was so disorganized, I'd make a checklist, lose the checklist and spend the day looking for the checklist as opposed to just making a new one...
This is something that you have to have you whole life, not something that happens overnight... some people disagree with ADHD as a diagnosis, but me living with it knows that it does exist and it is not an excuse...
Look it up and see if it hits you close to home. Hope this helps and hang in there!