Hello,
It’s right not to visit a dentist, if you are six months
pregnant & other family members are covid positive. You need to maintain his oral hygiene, don’t allow food to get stuck in the cavity. Whenever the food will get stuck, the pain will occur. Along with that you can give him Ibugesic plus syrup (5ml X 2-3 times/day) only as per need. (Assuming he is not allergic to the medicine)
Next Steps
Visit a dentist, once things are fine at your end.
Health Tips
Maintain proper oral hygiene, rinse after every meal, brush twice daily & don’t allow him to have sweets for now.