Sue, it can take a good few days post a fill for it to settle and for that restriction feeling to kick in. When I had my first fill, I felt little for the first few days, but a lot of it is changing the food to make the best of the restriction and when you get onto crunchier foods you may well notice it. Also, restriction can vary, with TOM as well as emotion/stress levels too, so while the next fill may seem a long way off, you may also find that it changes during the days.
I had my 3rd fill on friday, and am on liquids only for 3 days, but while I feel as if it hasn't made a massive difference yet, I know that it does change during the month and you kind of find that it evens itself out too . . .but, so much of it is about making the right decision with the foods in between times.
I just had 1.5mls put into my band, so now have 7.5mls and it was 3 months from my last to my most recent. Although I've had no restriction, Im still losing on average 3-4lb a week with the positive changes in what I eat, protein based, carb limited and bang in the exercise too
Hang in there . . .give it a while too, you may notice with variations a restriction with certain foods - crunchy and filling the way to go