Hi there
I am having more or less the same problems as you are and I agree, it's not nice:(
I was banded Sept 08 and had no problems till I had my first fill 4.5 mls. I felt the band get tighter and tighter until I had an e,ergency aspiration carried out last week, surgeon said he took it all out but there was only 3mls in syringe!
I had about a week of relief but feel it's now getting tighter and tighter again. I am finding it difficult to get liquids down and the burping has started agin, big time.
I am giving it another week and if things have not settled down, I will be back on the phone asking to see surgeon again. I can't live my life like this either.
I'm not sure if it has slipped, I think the next step will be an endoscopy to see if all is ( or not) well