I get it. Your chest is tight, you’re hyperventilating, your heart is pounding, your hands and feet feel numb. Fear, dread, and unreality have taken over your brain. You’re sure you’re about to keel over and die. You’re not crazy. These are the symptoms of a panic attack. In fact, a panic attack and a heart attack feel so similar that many people call an ambulance for assistance. (The one good thing about having your first panic attack is you’ll be better able to determine if future “heart attack” symptoms differ from that experience. If it’s an actual heart attack, you’ll know.) Still, don’t overreact. Sam Torbati, M.D., medical director of Los Angeles’ Cedars-Sinai Hospital Emergency Department, and Redditors of PanicAttack agree: If you’re under 45, physically healthy, and have a history of anxiety, symptoms are likely to go away after a few minutes of deep breathing. Just as a note, there have been exactly zero documented heart attacks that cleared up after breathing exercises. That said, if you’re middle-aged or older, you have known heart disease or other risk factors, or your symptoms are ongoing after 15 minutes or so, head to the ER to make sure.