Any tips on losing weight while breastfeeding?

I am 6 months PP and my weightloss has stagnated. I lost about 15lbs the first 3 months after my boy was born, but haven't lost a pound since. I try to portion control, but I get really hungry and frequently crave sweets -- I try not to eat sugar as much but sometimes fruit just doesn't cut it. Any advice would be much appreciated, I only fit leggings and I am tired of wearing stretchy pants without pockets lol.