The first 30 days postpartum 😭

Evelyn
Is it true that the first 30 days after delivery are crucial what you eat ? Cause I've been eating like a pig (cheeseburgers & junk) & I feel like my stomach was flat the first week after having my baby & now I have a gut again !😭 I have no time with the baby to cook anything so me & my bf been getting fast food all the time. Have you heard this ? Or is it trueÂ