Pain in the tooth while eating can be due to decay or the partially filled cavity as u said the previous filling has fractured. There is no cream as such to treat the issue, you must visit a dentist ASAP to prevent further damage to the tooth.
Take care
Next Steps
Pandemic has got people thinking to visit a dentist, but look out for dentist who are taking all the precautionary measures and you will be fine.
Health Tips
Delaying the treatment will only worsen it.