Gallbladder pain is almost always over the gallbladder - on the right. Pain usually starts several hours (sometimes up to 4) after eating. Sounds more like reflux to me. Or an ulcer, perhaps. Best check with your GP asap if the pain is happening a lot.
I know it is not always easy, but try avoiding fat and switch to 6 small fairly bland meals, if you are not already doing so until you see that doctor.