11 Weeks postparum ?!!!

Hey mommas

Im 11 weeks postpartum and a have a big belly

When i was 2-3 week pp i have more small belly than now! Wtf is going on ?! I don’t eat to much just 1 time a day or 2 sometimes!!! I was breastfeeding first 2-3 weeks but now im formula feeding ..

Can you help me how to remove the belly with any exercises ? Thanks