Loosing fat around my stomach?

Ok I have tried jogging, swimming, dancing, and working out. I try to eat healthy most of the time.. I might have cereal for breakfast or a cholocate bar once in a while. I have been doing a combination of these for the last two years. In the winter I do more dancing and treadmill and in summer i do more dancing and swimming. I try to walk everywhere.
I have lost weight everywhere except my stomach. my mother says I look pregnant because I have a skinny face, arms and legs but just a pot belly.
I am getting frustrated. Please help!! What actually works.
Loosing fat around my stomach?
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