How long before my tooth falls out? (Photo)

You should make sure your dentist checks your bite to ensure you are not hitting that particular tooth more heavily than the rest. You want to make sure you are wearing an orthodontic retainer. You might also consider the "pinhole surgical technique" to improve the gum recession.Good luck!

It appears you have receding gum tissue with your lower front teeth probably due to thin biotype of your gum tissue which is more prone to such condition. I suggest a consultation with a periodontist to discuss possible gum tissue graft to create a thicker and more resilient gum tissue. Splinting also may be beneficial. With good diagnosis and treatment, such teeth can be maintained healthy for many years.

There is
some recession on that tooth but periapical x-rays and pocket depths are also
used to evaluate teeth. If you are really concerned, you could always see a
periodontist (gum specialist) for an evaluation.