Hello mam!
Household bleach is very different to the whitening products your dentist uses. It can damage the soft tissue your gums, causing them to recede which in turn cause tooth sensitivity. Over-bleaching can cause lasting damage. The only clinically safe way to whiten your teeth is with a hydrogen peroxide solution prescribed by your dentist.
Next Steps
Kindly visit your dentist.
Health Tips
Dental checkup should be done every 6months.