Not the best thing to wake up to

What actually may have happened was: you was depressed by something or somethings else, that were minor in your brain, hence you wasn't sad, but you were taught since you were little that death is super sad, so his death functioned as a trigger to depression, considering those minor feelings.
But that's just a theory, a game mental state theory! Thanks for reading.

Condolences, I know the feeling :(