Have you gone to orientation yet?
Try to find out as much information as you can about both McIntire and med school, and then choose one–there are options for change if you decide you made the wrong choice (you can always take the science courses and apply to med school, and there is always the MS in commerce). It is difficult to do both premed and precomm. Each requires a high number of difficult weed-out courses with very low average GPAs (ECON 2010, STAT 2120, and CHEM 1410 all meet this definition), and you need a high GPA to get into med school and the comm school. The weed-outs for premed and comm school also don’t overlap. I think trying to do both at the same time would probably prevent you from doing either. I would start with the courses for precomm, because you have to apply to McIntire before you have to apply to med school.
McIntire recommends that you don’t take more than two quantitative prereqs in any one semester–econ and stats are both quantitative–so you could probably do those two together, but I definitely wouldn’t take either with chem.
Also, use vagrades.com for grade data, not course forum. A lot of more recent semesters are missing from course forum. It is also much harder to tell trends in grade data, like differences between professors, or if a professor has changed how they grade. Vagrades is much better in those regards. Typically, I read course forum for reviews and use vagrades.com for grade data.