Back ache and lower abdominal ache

I’m 8 days postpartum and up until today, my recovery has been great - really no pain at all. But I woke up today with awful discomfort in the right side of my back, mostly lower and it kind of wraps around to the front of my lower abdomen. Not pain, just constant discomfort. It feels like I pulled a muscle. FTM so I’m sort of nervous!

Has anyone else had something like this?