What should I do!?

I have received A’s my first couple of semesters in my courses. 

I have gotten a few C’s and a few B’s throughout my four years of college. 

I am 5 courses from graduating with my bachelors. 

I am retaking my statistics (I dropped it the first time because my mom was sick and I was struggling with the course). Well, I got a head injury and now I’m a week behind. I have a 65% in the course right now. If it matters, I am in the very beginning of the semester. 

Should I keep going? I really don’t want to drop it again unless I absolutely have to. 

Let’s say I do fail it. 

Can I still get fasfa?

 How bad will it tank my GPA?

 This course is super difficult. I need it to graduate though. I spent the whole day today basically trying to catch up and understand the material.