I don't have an obsession with my heart but I do get lots of chest pain..
Im thinking its more because of my stomach condition though..
Its quite common to hear of people thinking they've had a heart attack when they first get panic attacks because they just don't know what's happening...
Just know that your heart is fine
Unless you have ongoing issues with tightness and pain in your chest and feel your heart beating funny, seek help immediately as there could be something seriously wrong.
But otherwise, don't sweat it, just relax and it will go away
Hope that helps!