My Weight Loss has stalled for 3 months now!

I am getting discouraged. My LapBand surgery was October 20th 2008. I began a steady weight loss. I had my first fill Dec. 10th of 3cc. But after that not much loss. Then I had another 2cc fill on Jan. 21st 2009. AT that time I was down 33 lbs. I know 33lbs is good and my blood presure is down and I don't need medicine for it anymore. I no longer have acid reflux and thats good. But I still have a long way of weight loss to go and I seem to be stuck. I started yoga in February going twice a week. But that hasn't help me get unstuck. I am hanging around a 32 to 34 lb weight loss but it won't go on down. Has anyone else experineced this.

I was supposed to have a fill today but somehow they messed up my insurance authorization so I don't know when I will get the next fill.

Any suggestions. SHould I be worried? I still have about 80 to 90 lbs to go.