Panic comes upon you in a rush

A deep ache. A grasping-my-heart kind of throb. A tightening in the chest. A blow in the ribs. Forget deep breathing. Barely getting breathe out of the lungs. Not enough oxygen. Complete tenseness and flexing of the muscles in the shoulders and upper back. Cold sweaty hands. Numb feet and hands, traveling up the calves and forearms. A beating head. This is what a panic attack feels like, for me. Flashbacks.