How do you recover when you get seriously behind in a class?

I have been trying to catch up for weeks but nothing seems to be working. Between my job and looking after my younger brother after school I barely get any time for myself. My online course keeps adding new tasks while I am still struggling to finish the old ones. Yesterday I checked the course portal and saw another deadline coming up which made my stomach drop. I felt so stressed and overwhelmed that I started wishing someone could do my online course UK style and just take the pressure off for a while. Has anyone else ever felt this stuck?