Doodleloo, long ago and far away, there was such a thing as a liberal education or the liberal arts, which included a spectrum of the sciences, social sciences, humanities, and even the fine & performing arts. Your campus may also have "lib ed" or "gen ed" required courses for its majors, with even engineers required to take courses like "technology and society."
I wouldn't discount Sven's posts, because if you are so focused on doing well in your pre-med classes that the stress sometimes makes you feel ill, I have to hope that somewhere in your program you can take a course whose primary influence on your life is just to expose your mind to new and intriguing ways of thinking.
My understanding is that med schools do have hefty science requirements for admission, but they are also good with admitting students from a range of majors so long as those requirements are met.
I don't mean to talk down to you here. You are obviously one bright and ambitious individual, but somehow all of this seriousness and focus and "Doodleloo knows best" seem to be getting in the way of the good things that a university experience has to offer-- not to mention your personal satisfaction with life.
Also, sun-Leos are not like this 100%, but it is very common for them to dislike taking advice from anyone else, or even hearing other people share about their own experiences. Apparently these take away from *some* of the Leos' own sense of being queen in her castle. With the sun-Leos I know personally who are like this, I merely content myself with being the "good listener" because they will do whatever it takes to keep their leading lady role center-stage.
But at some point, does this really support them? We all have multiple planets to draw upon in our horoscopes, particularly at times when life screams at us that it is time to input an adjustment or correction.