Firslty you need a thorough checkup of your oral cavity. cavities should be treated as early as possible. Because slowly n eventually they create more dental problems.
Next Steps
(-) Visit a dental clinic as soon as possible.
(-) Professional cleaning and polishing of your teeth
(-) Cavities need to be treated depending upon how much they are extend.
(-) Their is some crowding present in lower front tooth, for that also you need treatment.
Health Tips
(-) Till then you should Maintaine good oral hygiene.
(-) Brush twice daily