I don't know if there's much you can do about the SATs with only a week until you take then again. If the problem really is just that you're a bad test taker then google test taking tips. Stay calm, have a good breakfast, know you can always take the test again once you've done more practice tests.
As for the classes keep taking Latin chemistry biology and math classes. College classes are what matter to become a doctor. Try to get an internship at a hospital or doctors office or join a program where they teach you basic skills.
There are alot of these programs around I've had a few friends participate in them.
If you have the money, you can get into medical school in a third world country.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.