Left sided pain after Roux-en-Y

Hello everyone, I had my Roux-en-Y surgery on June 26, 2017 and since then I've had extremely bad left-sided pain first it was attaining to my back and then to my ribs and him and now he seems to have gone from the camera incision site to my bellybutton and it feels like something is ripping and pulling inside. I've gone to the ER in within the past couple of days and after a CT and bloodwork they have said that everything is fine. They prescribed gabapentin for me but it is not helping. I was wondering if anyone else has experience this and if anyone could offer advice on how to fix this problem? I have also tried heating pad and pain medicine . But nothing has helped.