I used to tell my academic advisees they needed to do "backward planning" as we called it in the Army. When they asked me what courses to take, I asked them what they wanted their career to be.
If you know your goal, plan backwards from that. Don't take courses for the sake of the courses, take them for the sake of your future career. Sounds terribly obvious, but you'd be surprised how many college students take courses because they look attractive to them, lacking any coherent plan.
So OK, our OP will have a Bachelor's in Biology, with a minor in Biochemistry. Had I advised him earlier in his schooling, I would have told him this was just an intermediate step to a career in those fields. If he wanted a career right after college graduation I would have asked him what other fields interest him, because those 2 ain't gonna happen with a Bachelor's.
But I'm assuming these disciplines interest the OP, that he chose them. They aren't some Liberal Arts fluff, but rather difficult scientific fields (at least they would be for me, nothing I could ever do).
OK, so keep after them, if the OP did well in his undergraduate studies, going right into graduate school. If not so well, cut his loses, and try something else. But I doubt he has any future without a postgraduate degree, as several of us have said.