Postpartum pain

I want your advice please.. My Baby was from C-section and after some time I was completely fine no problem at all, now my baby is 10 months old. But I have back pain issue since last 2 months. I am in So much pain… not all the time but like in bending for from standing.. so i want to know is it because of pregnancy or other reasons? Are postpartum issue occur after 6 months like in my case I was fine for 6-7 months … back pain was there not very mild… occasionally… BUT now it’s part of my day to day life 😞