Someone already answered the MD vs DO question. A lot of people see DO schools as a fallback option for if they can't get into MD schools; I personally don't agree with this approach because osteopathy is a different "kind" of medicine, and the DO schools I've talked to are very aware of students who are only going to DO schools because they couldn't get into MD schools.
On a semester system, you should be taking anywhere between 12-18 credit hours; 12 being a bit low (usually four classes) and 18 being a bit high (usually six classes); this is assuming they're all/mostly 3-credit classes. Your academic advisers will know more about what an appropriate courseload is. For me personally, I never take more than two math/science/lab classes at once (mainly because I'm on the quarter system, which is more intense). But even on semesters that may be a good rule of thumb to follow.
Also, having a good mix of courses in the humanities would be helpful. You took a semester of pure BCPM courses (after withdrawing from English), which is 1. a bit dull after a while and 2. quite challenging. You will need to spend a good amount of time in the future arranging your schedule so that it is balanced. I like having a bit of variety in my schedule so I always take one class that's quite different from the rest.