Knowing from experience I lost my band in May of 2008. I did not have any pain but was unable to keep anything down. I would have acid reflux at night while sleeping and would PB all day. I lost weight very fast. I went from 180 - 145 in 4 weeks. I was very dehydrated and sometimes weak. I went back and forth to the doctor and was told that I was eating too fast. It was not until the rapid weightloss that my doctors begin to get concerned. With all of that said, I am now doing fine and have a New Band and a New Doctor.
If you are having issues go the the doctor. If it is a partial slippage it can be repaired.
EJ