I'd say do psych, as a Chemistry and Psych (Neuroscience) major and Philosophy minor. Psych classes are very easy (n=1) and you're likely to be able to attain a high GPA without much effort or trouble, freeing you up for other involvements.
The only thing I would consider is what you will do if med school (or pre-health in general) doesn't pan out. Unless you want to be a counselor or go into a few other specific/limited fields, you won't have a great amount of latitude in your career. African American studies even more so, but I'm assuming you're doing this for personal enrichment anyways and not with the intent of landing a job later.
EDIT: have you taken a psych class yet? The one other thing I'd say is that I found many psych students insufferable (many of them at least), which seemed fairly particular to that major. Partly I think this is because it tends to be a fall back major, so it's an odd bunch of "college for the sake of college" students and people who think they are quirky and smart because they're studying the ~~mind~~. You can probably tell I didn't have a great time with my psych cohort.