tightness issue

HI there-I was banded in mid october, lost 13 lbs so far, I'm good with that! Had one fill in nov and a second one in mid dec. I could eat smaller ammounts of almost anything, if I ate slowly. Now, 2 weeks after the last fill, the food travels down with difficulty and I can feel it go into my stomach with a struggle! Does this sound familiar, and why did this happen only 2 weeks later. I'm due for another 1 cc in early Jan. It doesnt feel right that food I've chewed well should be feeling like it's huge and struggling to get in --first bite, second bite, almost everytime! Any comments would be helpful!