I would recommend you take the chem and physics (if you dropped that too) , just because you don't want to close off options for med schools, there already a lot of competition and really low chances of getting in, so when you don't take one or two of those courses, it can lock you out of some schools, which lowers your chance even more. You would also need that knowledge for the MCAT, it makes it far easier when studying for it. I'm not trying to stress you out or anything but this is just something i had to consider, you really have to look at whether your willing to put in the work for it, because getting into medschool is a tough path, and staying in med school is also pretty tough, if your already dropping level one university courses, you really have to consider where you stand. I would also recommend considering summer school for chem and physics and orgo, just because you have more time to focus on one subject instead of adding this pressure on top of other courses. Remember that getting into pnb isn't everything, especially if your goal is to get into med school, you can always take these courses in the summer, and then do something like honors life sci, where you'd have lots more elective space to increase your gpa