I honestly don’t think I’m the right person to respond to this but, I assume if you have had experienced bereavement, those thoughts and feelings could be brought to light again after seeing others in a similar situation.
If you feel so bad to the point you aren’t able to go about daily life, I would recommend talking to someone you trust about it or a therapist. As humans, we naturally associate things with other things, so there is nothing wrong with you feeling this way. My heart goes out to you and if you feel you can’t go into work, your mental health is more important so try to talk to someone today and take a sick day or something along the lines if need be.
Bless you, bereavement is never easy, but as long as your strong enough to talk about it, that is all that matters. 🫶