Aside from worrying about academics, what else does an engineer?
Are you aware of all the expectations of a pre-medical student? There is so much more than simply worrying about getting a good GPA, experience is vital to getting accepted. I had a friend graduate from UW with a 3.5 GPA and a solid MCAT score and she didn't get secondaries to any school she applied to because she had NO volunteer, or clinical experience. You are expected to job shadow numerous physicians in different fields, you are expected to work in the clinical field, do research, volunteer and be a part of the community that you intend on changing, merge all that with the rigors of a difficult pre-med coursework, and I think you have something that is comparable if not more intense than an engineering program.
Correct me if I'm wrong.