[vletrmx]

When you say thinking of a career change. Do you mean quitting the course of study you are currently on? If so can I suggest sticking with it till you graduate, then if you still want to pursue medicine the door is still open to you, but you haven't lost your current qualification for nothing.

Edit: grammar

[majewsky]

Depends on how long he's been studying. If he's in his first or second semester, I'd suggest to change majors. If he's already writing the final thesis, I'd follow your suggestion.

[nativelukas]

First, I want to finish my bachelor's degree in CS in 2018 not to throw away three years of studying without any proof.