I put on loads of weight after i had lo due to sitting around bf eating junk food and tonnes of chocolate! bf made me so hungry but that's calmed down now. I started dieting and exercising about 3 months after she was born and i did notice it affected my milk at first as i wasnt eating and drinking enough, so now i try to eat plenty but healthy foods and i've been losing 1 - 2 lbs a week, and now im trying to cut out carbs as much as possible and my milk still seems fine. I also drink loads of water which is important, it will help with your milk and losing weight