thought you had a heart attack but didn't ?
 

Ever felt the symptoms, and tried to look up what it was ? Practically everything you read says "Go to the emergency room". What happened ? Was it something else ?

Everyone that I've known that thought they'd had a heartattack... but found out differently at the docs or ER ...was told it was likely a panic attack.

If you really had an attack, it'll take you some time before you can do anything else than rest.