Should I drop this cl or stay in it?

I just got a C on a midterm for finite math. The test before hand I got a C-. I have only till october 27th to decide to drop a cl. Also I figured out that I would need an A- on my next two tests to pull a B in the cl. Which is highly unlikely because I studied my *** off for my finite midterm and still got a C. FFFFFFFUUUUUUUUCCCCCCCKKKKKKKKK!!!!!!! Should I stay and just study my *** off for the next tests or should I drop the cl?