Pain in my right upper side of tummy??

I had surgery about a year and a half agao now and lately after i eat i get pain on the right side of my abdomin, (i dont have a galblatter) its a throbbign lil pain like right under my ribcage just seeing if anyone else knew what that might be or have the same problem. Thehy have made me drink that nasty crap and did a catscan and everything looked fine so i have clue!