Hi Maria!
 
If you tested out of Chem 130, you do not have to take it and you can just include the letter of exemption in your medical school applications. There are only a few medical schools that require a 4 or 5 on the AP chemistry exam, so if you received less than that but still tested out according to Michigan’s standards, you still have to take chem 130. (Examples: UC Riverside, University of Connecticut, LSU School of Medicine) Here is a guide that was updated in 2019 with AP credit acceptance by medical schools.
 
Some schools accept AP scores but ask that you take upper-level chemistry classes as well (this is the same situation with AP Biology credit) so I would recommend looking into that for your junior/senior year if you choose not to take Chem 130. I would also suggest double-checking with a Newnan pre-health advisor based on your specific circumstances. One important thing to note is that you still need to take the intro chemistry lab (chem 125/126), even if you have tested out of Chem 130.
 
Personally, I don’t think it would be too heavy, but it will definitely keep you busy and it depends on how many extracurricular activities you have going on. We usually recommend no more than 2-3 science classes per semester, but since you seem to already have basic chemistry knowledge, I don’t imagine Chem 130 would be very difficult. Keep in mind that chem 215 is relatively time-consuming, physics 135 is less-so although now there are weekly quizzes + final exam, and Pubhealth 200 is memorization-heavy.  If you do take Chem 130, have an alternative option ready, such as a lighter-load humanity/social science class, in the instance that you feel overwhelmed and need to drop one of your science courses. Let us know if you have any other questions!
 
Have a good fall break,
Leen, PMH Advisor