Severe pain upper abdomen center just beneath rib cage and to the right.pain starts mild and increases to sever then stops ?

Gall bladder?: Could be gall bladder or possibly an ulcer. See a doc for some labs and an ultrasound.

Biliary Colic: The pain that you are describing sounds consistent with gallbladder disease. This pain is often described as a non-cramping, non-burning, steady pain in the upper right and midline abdomen. The pain typically occurs after eating (fatty) foods, may be accompanied by nausea, vomiting, and/or bloating, and typically resolves within 1-2 hrs. A simple ultrasound can make the diagnosis.