Have you taken measurements and before photos? Have you noticed a difference there?
Also, consider posting your food journal to the general diet group and see if they can analyze it and come up with suggestions where things might be going wrong.
Believe me, I've been there (was just there) where I was telling myself I was eating small healthy meals and exercising alot and not losing. But when I really analyze what I was eating, it wasn't enough. I was kind of fooling myself into believing I was doing all the right things but really I'm not.
You could go and have your thyroid hormone levels tested to make sure you aren't low, and talk to your doctor about the weight loss, but be prepared for some honest perspectives.