my fear of death

a few years ago I went to therapy bc of my fear of death. I was scared of dying, or more so, everything ending. I obviously wasn't given any answers, just tips on how to calm down whenever I got too overwhelmed by my fear. 

yesterday I spent at least 10 minutes crying in the shower about how terrified I was of dying. This fear hasn't really been reawakened like that since my therapy-age, but now I have this soon-to-be-vomited nauseuos fear lingering in my throat. I feel like every passing second is being wasted and I can't stop thinking about how everyone I love will eventually die.

currently pretty sick and on my period so that might explain everything. istg tho if this fear escalates... >:(