Do not worry mam, sometimes the feeling of numbness stays on for quite sometime in some individuals. It should become normal by Tomoro morning. Please do not bite to check whether feeling has returned or not. You may accidentally harm your lip or cheek and traumatize yourself.
Next Steps
Wait for Tomoro morning. Rinse with warms salt water. Do not bite or pinch that area. Do not have hard foodstuff.
Health Tips
Take care. It should get normal soon . Consult your dentist Tomoro and mention this incident in your case paper so that next visit the dose of anesthesia may be reduced.