What does severe contaction-like pain starting around five in the afternoon on both sides of my stomach just under my ribs mean? Before it starts i am very nauseous and no i am not pregnant, am 44yrs of age, have osteoarthritis mostly in my lower spine and spinal cervix my hands and elbows, irritable bowel syndrome c and d, achilles tendinits, spondomylosis resulting in migraines.