Revision Surgery

Has anyone ever had a revision of their original RNY surgery? I have not lost any weight in over a month in spite of the fact that I have been eating right, working out and drinking my water. I gain and lose the same 3-4 pounds all the time. I don't get dumping no matter what I eat and I think my pouch is too big. I am nearly 6 months out. Has anyone heard of having a revision of the original surgery? I have a doctor's appointment on 11/11 and I intend to inquire about it. Thanks for any input. Sue