Good afternoon Sir,
First, your teeth are attrited means Enamel is gone and underlying sensitive layer is exposed. Due to this condition since long time, pain is there now, which maybe of mild to moderate level. You need to see a Dentist but as Corona concern is there, I am advising you to get one specific toothpaste and start using that for reducing sensitivity and pain.
Next Steps
Elsenz or Acclaim Toothpaste by Group pharmaceuticals.
Health Tips
Avoid any food that is very cold or very hot. Like stop eating ice cream, very cold water, Hot coffee, tea etc. These will only aggravate pain.
Regards