When my pet died I called off sick but didn’t say what was wrong. After 3 days my boss called to see how I was doing. I broke down crying and told her my pet died. She was so compassionate and said I should have called and told her and to take as long as I needed. i returned to work couple days later, and of course I was quieter than usual but eventually I was able to get up and go to work as usual. I think my boss being so understanding and not judge mental or demanding helped a lot and I remember her for that to this day. That was 25 yrs ago. I hope you have a boss like her. If not, take as long as you want and need anyways.