Breathe. Take things one little step at a time. Do you have an adviser at school whom you can talk to about your situation? Can they help you talk to teachers and school administrators about compassionate leave from school requirements and settling accounts?
Reach out to your community - sa barangay or private advocacy groups - to see if they could help with your situation. You've just suffered a loss - a great loss - and your energy and ability to concentrate will be greatly impacted by this. It's okay to feel overwhelmed; I would be, too, if I were in your situation. Trust in the kindness of your community. Trust that people would want to help. Believe that there's a way out of this. You are not alone, OP. You're not alone.