It’s too soon to give up. There is still time to improve your grades and get your GPA into a range where med school is a possibility. But every pre-med needs to have a Plan B–because every year 60% of med school applicants don’t get accepted to med school.
You can change your major if you think it will help you get a better GPA or if a different major will offer you better career opportunities, but remember you will still need to take all your med school pre-reqs: bio, ggen chem, ochem, biochem, physics, math, stats, sociology, psych and writing. Sometimes it can be hard to fit in all those pre-reqs and still finish your major requirements and any GEs required by your college for graduation.