I had a 205 heart 2 weeks ago after drinking I had a 205 heart 2 weeks ago after drinking 3 cans of energy over the course of a morning but now it’s left me worried! I have so much pain under my left breast and awful pain in the middle of my chest front and back! Also heart palpitations! What can it be? over the course of a morning but now it’s left me worried! I have so much pain under my left breast and awful pain in the middle of my chest front and back! Also heart palpitations! What can it be?