Master of CS capstone workload question

Hi! I'm a Master of CS student in my second last semester. Right now a course is giving me panic attack and I'm afraid there's a chance to fail. Since today is the census date, if I drop this course, I'll be unable to add another.

But, this is my second last semester, and if I do, I'll have to select one more unit in my final semester, and I'm not sure how it'll affect my capstone project. Any ideas?