You may not be eating enough.
Add more food...but only "free" food ...no or little calories and no fat. (Raw veggies and fruit.)
Your body may have shut down into starvation mode and is storing everything.
I've had doctors not believe me... it took one who cared to tell me the above.
Check the Holford Diet book out of the library (Glycemic loading computed for you.) It's full of good USEFUL information and guides for eating.
Keep doing what good you are doing, just because you haven't lost weight doesn't mean you aren't eating healthier.
(((hugs)))