You have a disc bulge at L4/5 that is compressing on the nerves of leg. That's why you are having back and leg pain. You will need medications, rest for a few days, a few Do's and Don'ts and physio. It is better to consult in person so that the exact problem can be addressed.
Next Steps
Click on this link to know more about your back and do's and don'ts.
http://neurospineclinic.in/resource/spine/back-back-dos-donts/
Health Tips
http://neurospineclinic.in/resource/spine/back-back-dos-donts/