You may use any diclofenac gel like Volini or Omni gel for your back.
You may give hot water fomentation for 10-15minutes twice a day.
While travelling use small soft cushion for your back, you should take breaks and relax by standing approximately for few minutes.
You can do mild stretching to your back based on your ROM( Range of motion) twice a day.
Next Steps
If the pain persists you need consult a Physiotherapist or Orthopaedist for further evaluation and treatment.
Health Tips
Avoid strenuous activities.