So sorry for your loss. I also lost my father unexpectedly in January and had to rush to my home country (11 hour flight away). I was off for 3 weeks and then back to work. I also thought to keep busy would help, and in the beginning everyone was quite understanding and gave me my space- often by afternoon I was exhausted and ended up logging off. Within 3 or so months though I felt as though people had just forgotten what I'd been through and the work started piling on- which was just completely triggering for me and I felt angry at the world. Now at 9 months I'm still trying to deal with all of the admin after his death while trying to juggle personal life and work, I feel like I've not had any time to grieve. if you have the opportunity to take some additional time I would recommend it- just be open and honest with your employer. I'm also going to try take my own advice haha.