Thoughts of a new major already

So currently I am majoring in Biology. I wanted to get my degree in Biology along with athletic training and then go onto Physical Therapy school. I have always been into sports and like staying physically fit so I thought that physical therapy along with some athletic training on the side would be really fun and interesting. I was soo excited about majoring in biology at first because I loved the sciences and I still do. I just am not sure if I love biology. I'm more of an Anatomy and Physiology person but anyways the reason that I'm not completely one hundred percent sure about biology is because of the way it is taught. I did fairly well on the first test but this second exam is over SIX chapters. That's alot in the first place but my professor has been flying through it. We are already almost done with the last chapter and the test isn't for another week and a half. He doesn't post his powerpoints before class so you can't write down the notes ahead of time and during class he'll leave the slide up for about two seconds then switch to the next one. I barely get three words written down. Plus he hasn't explained any of the content very well. I've read the chapters ahead of time before class but it still doesn't help much. I know that I am not the only feeling this way because I have talked to other students in my biology class and they agree with me too. People have also tried asking him to slow down but he just knows the information so well that it is hard for him to pace himself. Also there is this very intimidating lab exam coming up that all the upper classmen have made it sound like it is impossible to do well on so I'm super nervous for that. This week though, I found out about the fitness management major. It has all the requirements I need to qualify for Physical Therapy school. It contains athletic training classes, nutrtition classes, and some of the biology and anatomy classes but it sounds way more interesting to me. I love nutrition, athletic training, and anatomy. Plus I won't be set back at all if I switch because the fitness management major requires me to take the biology and chemistry classes I am taking this semester and the ones I am taking next semester. That is also another positive along with next year I wouldn't have to take organic chemistry! Another humongous positive about switching. So that is my feelings on it but I still need to run the idea by my parents and see what they think.