why doubt yourself

I have a friend who had to finish a research paper in a day plus preparing for a presentation. Unfortunately I was on the same boat. It was assigned almost two months in advance, but we waited til the last day to complete it. He actually got to finish his on time but I was a day late! If it wasn't for me doubting myself and procrastinating like the nimwaddd I am, I would've finished on time just like my friend. When I think about it now, I definitely could've finished on time and receive a good grade if I weren't thinking so negative the whole day. Good thing I finished up the whole project by the next day, leaving it only the research paper a day late. ANDDDD luckily the group that went the day we were suppose to go took to long. So we had a lucky break and I had extra time to prepare my presentation. Also I still got an A on my late paper. How lucky was that?? haha but luck doesn't come all the time so never should you ever doubt yourself, and think positive!!!