I Once Hated Med School

The fourth prompt in Writing 101 is about loss. It says, "Write about a loss: something (or someone) that was part of your life, and isn't any more."
I don't like that prompt, to be honest.
Actually, I'm a person who can move on easily after losing someone or something. I think I will talk about the loss that changed myself: the lost of interest in medical school.
I've always been interested in medicine. When people ask me why I choose to study medicine I always say, "Because I like it." However, there was time when medical school seemed to suck my life.
I was in second year. The subjects were difficult at that time. We had to study neoplasm, musculoskeletal, respiratory system, neurology, reproduction, urology, digestive system, and cardiology. 
Those subjects are important but they were overwhelming for me so I lost my interest in learning. I didn't study well for tests and exams. I didn't read a lot before group discussion. I didn't really care whether I failed or passed a test. I was like, "Why should I study this? I will forget it anyway so why should I study?"
I felt guilty for that but I just couldn't focus my mind. I just lost interest. I was tired. 
Now in my third year I'm doing better. I'm not sure why. Perhaps because the subjects in third year aren't so overwhelming as in second year. Or there may be other causes.