How were your periods after childbirth for you girls? We're on our pe…

How were your periods after childbirth for you girls? We're on our period because I already had my first period and it passed a few days before it started to hurt really bad in my stomach, went to see a gynecologist for an examination and ultrasound, everything was normal and that it was the first period starting. Now I should have the second one next week, but my stomach hurts badly, like it's going to come soon, and weakness is coming. The lower back hurts, well, this is because the baby is constantly on his hands, he weighs 6 kg, you carry him all the time. Has anyone experienced this? What kind of pills do they take for contraception? Because