Pre-med switching out of engineering, need help with major selection.

Hello! I am a freshman at Pitt who started off in bioengineering and next semester I am going to switch into another major. I realized that engineering was too specific and I wanted to explore other things before I went to medical school. Getting into med school is my number one goal. For the major I am switching into I am conflicted between Neuroscience and Mathematical Biology, I also want to pursue a second major of either political science or religious studies. I am not too worried about my second major, but I am very conflicted between Neuro and Mathematical Biology, Would it be better to just major in Neuro and Poli Sci/Religious studies or to do Mathematical Bio, minor in Neuro, and major in Poli Sci/Religious Studies? I am more interested in Neuro, but on my calc midterm I got a 99, so I"m wondering if Mathematical Biology will be too hard for me because it involves theoretical math and I have never taken any theoretical math classes before. On the other hand, neuroscience is the second most popular major at pitt for pre-meds and I feel Mathematical Bio would help me stand out. This semester I am taking Chemistry 2, Calc 3, Physics 1, and a Literature Class. In all honesty, I know which major will give me the highest GPA will be the best, but I am having a tough time deciding between the two! Please help!!
Thanks!

You do not have to decide on a major yet.

Meet with your advisor and plan out your schedule for spring semester. Leave your options open.

You could also major in the humanities, as long as you take premed prerequisites.