TMI- pooping question..

Brittanie • Ariel Diana Nichole was born 9/7/16😊 Pregnant with my 2nd 💕
1 month and 5 days PP. I've still been having trouble on and off with pooping, I didn't poop for a week exactly after I had my daughter. Now it's every other day or every couple days. But when I DO poop, it's not hard to, but when it comes out, I feels like my butt hold is literally being cut. Like my poop has a knife in it each time or something. I've never had this problem before, and THAT hurts. What does this sound like to you ladies? Please help. My ob appt is next week.