Do I have ADD or ADHD?!!?

Talk with a doctor. A website can't diagnose whether you have ADD or not. In my opinion, you might have ADD. I have ADD, and I have a lot of similarities with you; waiting until 8PM or later to start homework that's due the next day, forgetting ignments, talking before I think about what I'm going to say, and not being able to focus even when I try. I saw a doctor and I was put on Adderall and it has helped me with school a lot. I'm in college now and I'm getting all A's. And if you get put on Adderall or Ritalin, etc (any stimulant, which is what is usually used to treat ADD), it will be harder for you to go to sleep. So make sure you take the medication EARLY in the day if you end up getting any meds. Take care and I hope you can get it figured out!