Hip and back pain after your coil procedure is usually not caused by the coil itself, especially since your scan already shows it is well placed inside the uterus.
Next Steps
Please see an orthopaedician to check if this is a musculoskeletal issue related to weight or posture, and update your gynaecologist with your scan findings at your next visit.
Health Tips
If the pain worsens, spreads, or comes with fever or unusual bleeding, please get it reviewed in person soon.