I understand the feeling. It is like a gut feeling, like energy being sucked out of you. Like it is just a chore to even breathe. You feel lifeless, and empty. Every breath takes so much energy out of you. I feel it in my stomach, my chest, like a tightening, a knot. Like a weight pressing on your chest, causing you to not be able to breathe as easily. You just want the weight to be lifted off you, but it never goes away.