i'm failing....

i'm currently failing my major subjects....
i don't know what's happening to me. i'm out of focus. i know the answers but the terms seems to fly somewhere else. i understood the concepts but during exams everything seems to be a complete blurr. i don't know what's wrong with me. during the exams, i know that i should change my answers but i decide not to do it.
i never liked histology. i don't like tissues because they all look the same to me. but this feeling did not prevent me from listening to my professors. i learned a lot from them and i try to apply everything. i try to make sense of all teh tissue samples flashed in front of me. but in teh end, i fail. i'm not failing literally (i still get average to above average scores in th quizzes and long exams) but i'm not meeting my standards. my grades started to become lower since last summer. its already the 2nd semester and it seems like i haven't coped up with the change in load. i need to fix this soon. i need to get higher grades. i need to study more.
i need focus....