Suggest Treatment For Pain In The Navel Area

Hi I have been having some stomach issues such as a very very sharp pain that runs from right above my belly button to about 3inches below my belly button, with the sharp pain directly down the middle to those measurements. The rest of the stomach is a little sore but mainly in this area, it happens everyday and it lasts for about 5 min. It normally happens just once to sometimes twice a day. To where I can t stand it takes me to the ground and is intense for around 5 min non stop the same extreme amount of pain. Now I do take a medication called methadone because of a 4 year addiction i had with narcotics, with just narcotics nothing else. I have been off of them for a few months now, this pain came very seldom during the time of using narcotics, I haven t had to much of a time with constipation during my 4 year use witch is expected but nothing real serious for a long period of time. I doesnt seem to accure when I drink something or eat something my appetite has no effect on when this ocures it happens completely out of the blue whenever it decides to. I have noticed it comes around the 11:00 to the 3:00 hrs in the p.m is the only pattern I have noticed, it is the same kind of pain every time same place and same amount of time it happeneds.