One thing that helped me lose a lot of weight was cutting out all sodas (and similar drinks) - diet or not. I drank a lot of tea and water, but not many juices.But honestly, at only 128 lbs I don t think you need to lose 14-20lbs at all! (Ok, depending upon your body build, but for 5 7 you sound about right, weight wise, to me. Maybe just work on toning muscle?) Just my 2 cents...
My wife and I did Nutrisystem for a few months, we each lost 40 lbs and we were never hungry.