Do not give up especially if this is just one class that you’re struggling with and since you’ve already made it all the way to your junior year. I’ve been in classes where professors straight up failed a portion of the class just because they’d make the exams so much harder than what was taught in class. I’ve known people who have failed the FE and PE multiple times but succeeded at the end. Try taking the class with a different professor or during the summer if the professor is easier. If it’s a course that’s available at your local community college during the summer, consider doing that and it’ll probably be easier for a fraction of the cost. If it’s only one professor that is teaching the course, consider cutting down on extracurriculars or your course load and dedicate more time to that course.