Hey, I don't identify with switching to a math major because I always found math the most challenging aspect of engineering. (I knew people who thought Math was a pretty easy undergrad major. I know I would have had better luck flapping my arms and flying than graduating with a math degree.)

But I did enter school interested in biomedical engineering--in part because my parents were both in life sciences in various ways. And I probably liked chemistry more than physics in high school. That more or less lasted through taking organic chemistry which I did not... umm, connect with.