Anyone else does things on "the last second"?

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Could be that you are just lazy or that you have a mental disorder. I have ADHD and I forget things all the time. Concentrating on studying is almost impossible.

What kind of mental disorder?

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I don't know there are lots of them. You have to do some research yourself on these matters. Could be inattentive ADHD which for example makes me a pro procrastinator or something else. Google your problems and see the results. That's what I did before getting a diagnosis.