Well, it could be that fat is being replaced by muscles. Muscles weigh more too IIRC. Also, how long since you've changed your habits? Weight also fluctuates alot over a month and your body wil take a little while to get with the program
Fat on your stomach (the omentum) is indeed what you want to reduce, because it will start producing hormones that will make you want to increase fat even more.
So keep it up! Get your blood pressure measured, and maybe a blood screen if you're concerned about some physical problem that may make it harder.
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