Feeling sluggish, tired and i can feel my heartbeat beat really fast after eating pizza and drinking soda. is this the food? or something else?

See below: Unfortunately it's not possible with a limited amount of information to give you specific guidance. Generally a fast heartbeat would not be a result of eating a specific type of food. Most episodes of palpitations in otherwise healthy individuals are not the result of heart disease and frequently occur in patients with no other evidence of a heart problem. See: http://bit.ly/1vlj5cr