U can take pain killers for the time being like T. Combiflam one tab three times a day after meals. U have to see a Neurosurgeon and find out the cause of the back pain which is possible only by a proper history and clinical examination and if required and MRI.

Low back pain in your case may be due to excessive long travels on rough roads... Also, poor posture with slouching can aggravate the problem..Vitamin D deficiency, esp if you have less sunlight exposure can be a contributing factor...In most cases, physiotherapy, correction of posture and limiting of road travel solve the problem..However please consult a doctor to rule out any major illness..