In this style of writing you use emotional tools, devices, to attempt to persuade your audience to agree with you. Think about your attempts to persuade your parents to change the curfew time they have set for you. If you see an overlap between this writing style and some of the other writing styles, you are correct. The method that is used in Composition is practice makes almost perfect. This is both typical and true.
Panic is the wrong reaction.
As I mentioned earlier, writing is a learning experience. We learn both from our mistakes and the opinions of others. If college profs can learn form critiques by their colleagues, you can also. Double-space your essays. It is easier for the instructor to make corrections.