do you ever have the distinct feeling that something is missing?

not like you've left the gas on or not, or that you're forgetting what you came into a room to do in the first place, but more like something important isn't there.

it rests somewhere around your gut, but branches out down your arms and just behind your navel.
Like, there's a... a hollowness that used to be filled in, or like you've just experienced the death of someone you knew, but nothing of the sort has actually happened.

it's not quite a grief, so much as you know inherently that you shouldn't be feeling like this and that off-putting feeling is rather empty and therefore depressing even though you can't fathom what's creating the feeling.