Hello everyone! With my first child, I had natural childbirth and the …

Hello everyone! With my first child, I had natural childbirth and the belly itself passed even without pulling, it became flat. With my son, however, it was a Cesarean section, and during the entire pregnancy I gained 15 kg. Now I've already lost 10. I weigh 66 lbs. The belly has become smaller, it's been about 20 days since it started getting smaller. When will it go away? Roughly? I am breastfeeding. Can't pull in. How many months?