Have you ever looked into food science? McGill has that major. The major requirements do cover alot of the basic sciences that would be needed to apply to medical school. My understanding is that people who major in food science become involved in a variety of areas related to developing, producing, and marketing food products. Perhaps that major would allow you to integrate your interest in science and your interest in art. I believe it is also possible to get a job with just a stand alone food science degree if you elect to forego education beyond a bachelors degree.