Heart Flutters-- yours is just because of your anxiety
state coupled by smoking marijuna, which increases heart rate
and so your chest flutter/palpitation
. Marijuna also causes transient relaxations of the lower esophageal sphincter, which is felt to be a significant cause of acid reflux
. If you have stopped smoking and symptoms still persist, take help of NeuroPhychiatrist for better management your of Anxiety States.