You take ibuprofen
medicine for your pain and follow the instructions to relive your back pain
1.avoid bending forward and lifting heavy objects.
2.don't sit on the floor.
3.when you sit in chair your foot should rest in a very small stool to avoid nerve
4.do regular exercise like lying in supine pose raising one leg till 90degree angle with out bending the knee, practice the same exercise on the other leg also and lie in prone pose keep your both the palms below your shoulder and raise your chest look up. Practice these two exercises in an empty stomach with the repetition of 10 times and maintain for 5 secs.
If the pain still persists consult doctor
and you need physical examination.
Hope my answer will solve your problems.