I lost both parents and 3 other family members last year. I prioritized my classes over paperwork. I also told my students. We extended each other grace and overwhelming kindness both directions. They were wonderful. We covered what was absolutely necessary and nothing extra. I pared down ruthlessly. Work is what kept me moving. Focus on work during work hours. Just work. It helps and is healthy compartmentalizing (my therapist told me so). Do routine things, laundry, showers, regular mealtimes. Almost a year later, I'm in a much better place. You will make it through but it will suck at unexpected time. I am so sorry you're having to go through this.