Bloating & Nausea

Since being banded in May '08 I have had lots of issues with excessive gas/bloating & recently added nausea to the mix. This has not been a good investment in my opinion since I have had to work so very hard & suffer with all these issues to only lose a total of 25 lbs since surgery. I've had to be unfilled completely twice due to being too tight once & having to have an endoscope. We are working back up to a decent restriction level, of which I have NEVER had except for the overfill that once. In the process of getting good restriction I find that I had an extra amout of gas & bloating problems. Does anyone else experience these symptoms when they aren't properly restricted? It seems if I'm unfilled I'm OK & if I'm close to a "sweet" spot I'm better but in between I have major problems.