There is a possibility of nerve compression / disc prolapse following fracture last year.
The fractured bone might have united completely but nerve compression might be still there... which may be causing this pain and radiculopathy..
Next Steps
You should get MRI of lumbosacral spine to get a better idea of the condition..
Health Tips
Use LS belt for support.. Hot fomentation, Analgesic tablet, local analgesic ointment can help relieving pain for now..