I think this feeling isn't just for the grief of a loved one past. I think this feeling can come when we experience a set back in our journey, when we receive a new diagnosis, and even when we're confronted with our "old" lives.
And it can hit you out of the blue, and it can knock you back a bit. It can put you on your butt and it can make you question whether you're strong enough, and whether you even want to keep on going. And it hits HARD.
Last week I got the results of my xrays and learned that I'm now dealing with osteoarthritis of my spine (in two places) and bone spurring (in multiple places). Hearing that, it sent back to the day I was hurt, to the day this all started for me...and all I felt was the grief.