i graduated med school in 1993 and have been a family physician for 20 years.
there's really nothing unusual about your choice of college major in comparison to other med school applicants. generally there are lots of biology and chemistry majors but there are plenty of others. personally, i got a degree in business management.
so it really won't hurt or help your chances of getting into medical school.
on the other hand, there are certain required pre-medical courses as well as some recommended courses. most of those are included in the biology and chemistry degree paths. so it likely means that you'd be taking those courses as electives. sometimes that means taking a heavier load of classes. sometimes that means taking summer classes. sometimes that means graduating a semester or two late.
i agree with the previous respondent that you really should discuss this with your college's health professions counselor.