Observing the stains on your teeth, it is possible that they result from the use of herbal-based toothpaste, as some formulations may contribute to gradual staining. I recommend switching to a non-herbal toothpaste. Additionally, certain dietary habits, such as consuming coffee, tea, red wine, or dark-colored fruits, can lead to tooth discoloration.  If you engage in any of these habits, consider moderating them to maintain a brighter smile.
Next Steps
Switch to non-herbal based toothpaste ! Change brushing technique