I have heartburn,indigestion along with belching,and trouble swallowing,I also get a really bad stomach pains a couple times a month that are unbearable.The pain is located at the top under my rib cage a little to the right.I have had this for a while pain off and on for awhile ,I went to a doctor for my back one day and he said on my MRI that my gallbladder looked thickened?And that I should go see my doctor what does this mean?

It means you should go and see your Doctor - it could be anything, serious or not serious, controlled by medication or not.

No one here can diagnose you.