Is there any radiating pain to the leg..?
Most common cause for low back pain is postural
Usually on examination we see spasm of the spinal muscles..
So you might need a muscle relaxant which could make your recovery quick..
Diclofenac gel local application
Vit D 3 60 k every week for 2 months might be needed
Hot fomentation will also make you feel better
After recovery you may have to do spinal extension
Next Steps
Swimming is the best exercise if you can do
avoid prolonged sitting..
Take a break for atleast 1 min - move around and go to your work again..
In case of prolonged standing .. take a stool and plant your foot over the stool to bend the knee
while sleeping keep a pillow under the knee
Health Tips
The catch is when you bend your knees your spine will be in relax state..
So try bending knees in places where you used to bend your back
Ping me in case you need any more suggestions