What Is Cramping Pain Under Left Rib Cage That Intensifies With Deep Breathing And Movement And Travels To The Shoulders?

Symptoms which your are indicating can be due to gallbladder problems. Gallbladder problem symptoms are pain in the upper abdomen near rib cage which travel towards shoulder especially right, indigestion, bloating, nausea, vomiting, uncomfortable feelings after eating, Gas etc. You can get jaundice, dark urine, rapid heartbeat with low blood pressure if you have stones or infection in gallbladder.
In my opinion, you should visit to a doctor for proper diagnosis and treatment.