Yes, X-ray is showing minor bony changes in upper right back region and that's about it. You are still very young, so the doctor might be suggesting aggressive periodontitis.
Even if you have this problem, it can be easily treated by getting proper gum therapy (teeth cleaning) every 6 months and close monitoring.
Next Steps
Visit a nearby periodontist (Gum specialist) for proper check up and diagnosis, this is the most important thing! proper diagnosis.
Health Tips
This condition usually runs in the family so check with your siblings, parents and grandparents, if they have all their teeth intact you don't have to worry so much!!