pain in left upper abdomen of sharp stabbing nature continuing for 10 year and radiating to shoulder calls for multiple differential diagnosis. you have already visited cardio to rule out any heart problem . you mentioned that your gall bladder
was removed., but what was the reason.your sub mandibular glands with lymph
nodes were removed and you were put on MTX.i would suggest you to go for a CT SCAN
of abdomen to visualize retroperitoneal structures especilly pancreas
, also to rule out any sub phrenic pathology.