Seriously. I feel pain

I always feel very very terrible after I come out of calculus quiz. None of the quizzes I came out confident in my mind that I do well. Knowing this is like a few percent of my grades... AHH
For the first one, I don't know how to do. Forget it.
For the second one, I made a stupid and really mistake. But somehow, to my surprise I got full marks.
For the third one, I painstakingly knew the answer to it in my instinct. But I chose to believe my original answer instead of my strong instinct. And I chose not to change my answer til the end. So end up, wrong again. What has gotten into me? Why am I so generous in donating my marks away?

And.. why am I always hogging on to a few percent quizzes, rather than being more conscientious and nervous about those higher weightage tests, like hp101 and 215. And MAS 213, I hope my script got lost and AJK won't be able to find it anywhere.

I really should put more heart and soul into my work.

Today I got a shock in HP101 when there is a pop quiz. Well, the lecturer is just doing an experiment in testing us on our emotions. Are we stressed? joyed? fear? What was elicited to me was stress, 3% of my grades! And Karen was slowly telling me, the first sentence she said was, "You missed the pop quiz" as I opened the paper. "What pop quiz? How many percent?" Then Karen slowly told me, "It was a prank..." Hai... but still I was quite late. I am always late throughout this semester, taking extra time off to sleep more, if not, taking the reason that it was a bad moody day that I don't feel like coming in early. Whatever the reason was, that's just not getting into my habit. I shall be punctual from tomorrow onwards. But then again, 8.30 am lessons, no guarantee. HAHA! But still, I will try not to be late. It's already Week 11.

Sometimes I just feel very upset about myself.