Student - What do I do if I was dropped for not submitting work during the first 3 days of the course?

Contact your instructor. AUO courses have assignments due during the first 3 days. Missing 1/2 a week in an 8 week course is equivalent to missing a week in a 16 week course. Your instructor may be able to have you enrolled in the course again if it does not negatively impact your chances of success in the course.