When I was a child and during my teenage as well as after teenage years my father used to tell me that if he dies I will have to take care of all my siblings. I have 4 younger siblings.
I used to fear death of my parents due to above. When my parents used to sleep, I would be afraid that they are dead so I would watch them closely to see if they are breathing or not.
This fear factor and the factor that my siblings are studying well or not or are they earning good or not used to be in my brains round the clock. It stopped when my youngest sibling has a good job for himself. That day I felt some freedom in my life.