This pain may be due to compression of nerve roots which are going towards the lower limbs..
Next Steps
You should take complete bed rest for now, start with hot fomentation, take analgesic with muscle relaxant tablet, apply analgesic ointment locally. You may also start physiotherapy for pain relief and get one X ray and MRI of lumbo sacral spine to identify the actual cause of the problem..
Health Tips
Avoid heavy work, avoid sitting down, avoid Indian toilet, avoid forward bending..