Hello,
As you are very young, back pain at this age is not good. As you haven't mentioned the other details relating to your health, I suppose this could be because of wrong position, lifting stuff in improper manner, too much traveling on your bike, obesity etc etc
Next Steps
I will suggest you to start doing regular and basic exercise like Suryanamaskar, Tadasan .
While sitting make sure you sit up straight.
Health Tips
Do exercise regularly it will help you. We have ayurvedic medicine that need to be taken oraly which will help you overcome your pain completly .No need for admission or surgery. No Panchkarma required. You can contact me online or offline. Tc.