Funny enough I am in the tail end of a similar situation as you are. I had to drop out last semester due to poor health and bad grades and was already on academic probation. I learned that to retain fasa you need to have 67% completion rate and at least a 2.0. This may vary depending on school but this is what my school had. Normally there is a apeal process if you do not need the standards for fasa where you explain why you did not meet satisfactory standards and how you will meet it in the future. Also you will not lose financial aid right away usually as you are generally given a little leeway. I will warn you that my information is not completely accurate and it may vary school from school. Wish you luck. Also screw calc in college.