I am undergrad chem major. I have a serious problem. This semester I am taking O.Chem, Gen. Physics 1, Genetics, and Calculus-total 20 cred of science courses. I love science (it's been my whole life's interest) and usually pretty enthusiastic about doing calculations, learning things, and figuring out stuff. But this semester things are somehow different. I lost interest in doing home works and studying, suddenly. I am taking a little more courses than I usually take and was struggling in the beginning of the semester, but was keeping up with hard work and careful scheduling. But now, it is halfway of the semester and I didn't do any studying for last 2 weeks. Midterms are coming next week, I am clueless about my classes, except calc. This sort of a loss of interest never happened to me before and it is strange. Suddenly, I don't want to work on the problems for hours or read textbooks or do practice problems. I just can't sit still and do stuff. What is happening? I frequently oversleep in the morning and miss at least one morning lecture and feel guilty afterward, but still can't push myself. I am just not who I was before. Nothing changed in my personal life, I don't have a boyfriend or painful break up, or any other issue, but the interest and will to work hard are not here. I wonder if it a regular thing that happens when you overwork yourself; your mind blanks out and get stressed. How can I spark my interest and get my persistence back? It is really bothering me. I have Physics homework due tonight and still don't want to do it. What the heck?