Hang in there.... I was banded on 1/30, and I too hit a plateau and yes, even saw some weight gain. Remember what you probably heard or read elsewhere - it's going to be about your 3rd or 4th fill before we get to that sweet spot.
I had my 2nd fill, and I'm not starting to have some of those sensations that's I've read about.... pain when things get stuck or I don't chew is one that I've really had. Dang, it sure hurts. I can tell a difference already and I finally have some restriction.
Now I just need to exericse.