a, you are not in medschool, yet
b, there is term-time and there is exam-time, i guess i am the one with several acquaintances who are going to medschool ( or finished already and getting their license )
IMO med and law are the toughest ( human ) fields ( i know nothing about engineering ) in terms of studying, but even they get freetime, trust me.
the only reason i chose my bullshit business BA over law studies, because i didnt want to bust my ass that much, God knows I regret my decision to this day
all-in-all delete the 'studying constantly for years' myth and look at them as humans not machines, afterall you want to become one