Taking five courses this semester as an Academic Foundations of Nursing student - am I screwed?

Hi, all. So I just graduated high school in June and I'm taking five courses this fall semester for Academic Foundations of Nursing. I am taking BIOL 1103, BIOL 1203, Intro to Statistics, Academic Writing and Reading Fiction. I am pretty good at biology; I got a 95 in Biology 12 last semester, but math I'm not that good at, since I got a 79 in Pre-Calculus 11, and I didn't take a grade 12 math. Should I drop a course and take it in the summer? I'm not planning to have a part-time job so I will be able to direct a lot of my time to school, but would the course load still be unmanageable even without a job? What do you think?