Could be Gallbladder, Gas can even do that..Better to see a doctor to rule out anything..Hope all is well...
How are you doing now, if your symptoms are persisiting, please see your physician.
I've been thinking of you. You might have a blood clot in your lung. Please see your doctor.
Could be your heart, or could be pleurisy (a drop of water in your lung can cause this pain, too.) You might try taking CoQ10 for your heart health.