Pain at incision 5 weeks postpartum

My c-section was 5 weeks ago, and I am now having a lot of pain again. It basically feels like it did a week after surgery, on my right side. It hurts to bend, stand up, and roll over. I have no idea what I did, I woke up with it hurting yesterday. I’m no doctor, but I’m assuming I pulled a muscle. Has anyone had any issues this far out from a section? How would I know if I messed up something internally?