You need to consult ortho Dr for the investigation procedure like x ray
scan to rule out the nerve
compression in the lumbar region and follow these suggestions
Don't bend forward and don't ride a bike for longer time and in an dumpy road
Don't sit continuously in one place for longer time
While sitting rest both foot in a very small stool to prevent nerve pull.
Don't carry heavy object.
After consulting ortho Dr follow the exercise as prescribed by the Dr.
Get well soon.