Uterine and bladder prolapse at 1 year postpartum

I went to my doctor yesterday with tons of pelvic pressure. She confirmed that I have both a uterine and bladder prolapse. I’m completely confused as to how this happened at 1 year postpartum. I did pelvic floor physio for 5 months after delivery and was discharged and told everything looked great! It’s so weird because it seemed to happen so suddenly! I’m being sent for an ultrasound on September 12th as well as going back to pelvic floor physio.

Wondering if anyone else had this happen a year or longer after delivery?