Back pain that is worst after lying down and eases once you start moving is common in the months after a twin pregnancy and a caesarean. Your core and back muscles take time to recover, and lifting and feeding two babies adds a lot of strain.
Next Steps
Try a firm mattress, a pillow between your knees when you sleep on your side, and a few gentle stretches before you get out of bed. Use pillows during feeds so you bring the babies up to you instead of bending down. If the pain hasn't eased in three to four weeks, see your doctor or a physiotherapist for an assessment.
Health Tips
See a doctor quickly if you notice numbness or weakness in your legs, fever, or any change in bladder or bowel control.