cant lose post baby weight

hey guys, i need some advice. have been working out with FB fot two years now, last time it really helped me to lose weight and build muscle, i looked and felt great. now im 3 months after second birth, it was a c cection. did 2 programs already, eating super clean and healthy, and nothing! same weight, same clothes size. like no change at all. whats going on? what am i doing wrong?