Hi i need sum answers please.

Kristal • I gave birth to a healthy girl on july 8,2015 at 8:46 pm and she weighed 7.4 pounds and 19 inches long
Is your second period suppose to be late after you have a baby. Cuz mine was suppose to start on the 14th but it started today instead and its light and watery and kinda brown and pink. And my whole lower half of my stomach hurts. Please let me know what u think. O by the way my first period after my daughter it started on the 14 of october and ended on october 20.