Hey swordandshield! Welcome back! If caffeine is making your chest hurt, it's naturally best to stop. My wife goes through the same thing. She can't handle more than one caffeinated cup of coffee, so we just drink decaf. To help with the lack of energy, have you tried taking Vitamin B Complex supplements? This is a natural energy booster and it works really well for my wife.
"Only the living have the privilege of saying they'll fight to the last breath. Words like conviction and resolve don't mean much to a dead man." ~ Raven
Frosting is the magic that turns muffins into cupcakes.