You must visit an ER for severe pain
. Try taking ibuprofen 400mg and methacarbamol 750 mg also twice daily after meals. this muscle relaxant
can remove stiffness
in back.Avoid sitting on floor, or forward bending or lifting of weights and do hot fomentation of back and rest on hard bed and use Relaxyl ointment to affected area.
most likely you have disc prolapse
for which you may need an MRI of spine.