Ugh, I just took 2 QR Math Destroyer tests and got an 18/40 and a 20/40. Anything that involves 2D or 3D Geometry is complete chinese to me. I had a half-decent understanding of it about a month ago but I completely lost it all. Even after reading the explanations it still seems impossible to me. My exam is on the 26th. What the hell do I do?