Shooting pains in my butt

Brittany • Mommy to a wonderful 6yr old boy, 2yr old girl and 1yr old girl.
Anyone else have this? I've been able to go poop no problems since right after I had my little girl. She is now a week old and the last couple days I've been getting sharp shooting pains when I feel like I have to pass gas or when I have to poop. It's sucks soooo much :-(