For the past 2 days i've had a sharp pain under left breast after eating, with a feeling of tiredness and weakness in my body to my fingertips and a wish to lie down and rest. There are also gas symptoms like burping but I'm a little concerned about heart ....
Your symptoms seem to be tied more to meals, which points more to gastrointestinal causes such as gastroesophageal reflux. If the pain responds to antacids (zantac/tagamet/pepcid) then this is further confirmed.