It's the intro to chem before the actual classes. The original prof who taught this class at my school got fired at the end of last semester for some reason and now the new prof is super disorganized, doesn't assign hw, and gives us poor practice problems that don't prep us for the exams. There's also a lab section included in the class that is run by TA's who would much rather be at home instead of the classroom. Horrible experience overall. The prof isn't even curving our last exam even though the class average was a 65%!
Don't mean to be a debbie downer, but the intro to intro chem courses should be a breeze. It's basically high school chemistry repeated, unless your school is just super hardcore with this intro to intro class. If homework isn't assigned, you should find your own homework to do to practice and make up your own practice problems/flashcards. Regardless of the disorganization of the class and the TAs' lack of enthusiasm, you should be able to answer most of the questions on these exams correctly. As for the class average being a D: keep in mind that those intro to intro classes are usually filled with non-science people so the low average shouldn't be that much of a surprise.
It's not impossible to bring up your grades over the course of your college career. As
@tammyp said, focus semester by semester. I would add to that that you should focus on learning the material and then the grades will follow. My concern in your situation, however, is that you're not doing well with classes like this intro class and in Spanish. I'm not sure what other classes you're taking, but if they're of similar caliber you should be getting all above Bs at a minimum.
Maybe you're missing the fundamentals that you didn't get in high school. That's not unusual. Many students enter college thinking they're ready but quickly realize that their knowledge base is deficient. But, more than that, they weren't really taught how to think critically. These may be things you need to work on over the summer. If you're serious about medicine, you need to do a lot of reflection and figure out what went wrong with these classes and what you can do to improve so it doesn't happen again. The real detriment for you would be if you didn't learn from these early mistakes and went on the same way you did before.
Also, if you're serious about medicine, you should be volunteering with at least a couple different organizations consistently and try to get some clinical experience somewhere as well.
