I had the same type of pain for like four days. Burning in the side of my stomach. I pulled stitches and my port moved. Had to get a second surgery to have it reattached. I went to get my first fill after my second surgery and they could not find it again. I hope things work out differently for you but that pain sounds so familiar. The only way I could get it to stop was to take ibuprofen. It was definitely stitches coming loose though because after that I could not feel my port. Good luck!!!