Uterus not shrinking anymore?


I’m 5 weeks postpartum c-section. And I’ve noticed my uterus hasn’t shrunk at all anymore in the last 3 weeks. I still look a few months pregnant. My stomach is still squishy, I’ve been having a lot of back pain mostly around my ribs, and in my pelvic to my knees. I’m still bleeding some, enough to fill half a pad a day, but also brown and yellow lochia. Is this normal, did it take more than 6 weeks for anyone’s uterus to go back to normal?