Don't worry..Nothing will be serious as u r so young.. Then definitely it will be musculoskeletal problem and check for ur bike handle whether it is rite on both sides. .if you are prolonged bike rider reduce it for a week..use some topical analgesic gels ... Hot water packs u can get in all medical shops will reduce ur pain.
Next Steps
If you are not OK with all that u can consult a physiotherapist nearby
Health Tips
If you are a system user.. check your posture.. use your system with proper support ..Thank you.. Get well soon..