Yes,you can be too tight. I just got reband 02/08 and went today for my 1st fill. You know they have you take sips of water to make sure it goes down fine. Well it did go down fine. Immediately when I walked out of the doctor's office I had the feeling I had to throw up. Well being too tight is not a good feeling it felt like I was in labor pains, or had gas trapped in by back. I throw up about 6-8 times crying I could not take it anymore. I knew something was wrong I called the doctor office and they told me to come back. When she took the fluid out the band immediatley the pressure and pain went away, this time I didn't want that much fluid.