College tries to overwhelm you, by giving you more than you can (or think you can) handle at once - like having to study for more than one exam at the same time. Its part of what makes you valuable to employers once you've finished your degree, because finishing your degree proves that you can deal with stressful situations, handle more than one problem at a time, etc. In many jobs, they don't even care what subject your degree is in, as long as you've earned one. For that matter, you can be a complete self-taught expert in whatever field you want a job in - if you don't have a degree, you might not get your foot in your door because you haven't demonstrated that you can handle these things.
Another thing too, colleges make you take a wide variety of courses (general eductation) because inevitably, you're going to encounter subjects that you don't like, aren't particularly adept at, etc. Getting your degree shows that you can persevere through these issues as well.
So the point of this post is to simply show you that although it seems tough, and it probably is, what you've got to do is to stop lamenting the difficulty or however hopeless it seems, suck it up, and get busy on it. Figure out how much time you have left, divide it up, read as much of each of those 6 books as you can. You may not make it through all of them, you may not study for the math test as much as you want, but you'll probably do better between the two tests than you will if you spend all your time lamenting your situation or being despondent about it. Good luck!