I have had the unwanted, kangaroo pouch almost all my life.

I am 22 years old and just had a baby 6 mths ago. It seems everytime I do lose wieght it goes nowhere and when I gain wieght it gets bigger. It only got smaller, surprisingly when I was pregnant. But now i'm gaining wieght again, (though trying to eat smart) and my pouch is right back where it was before. I don't know what to do, can anyone suggest anything that can help.