Hi,
You should consult your dental specialist and ask him/her to prescribe you toothpastes and oral rinses / mouth wash for sensitive teeth. That would help with the hypersensitivity.
You should try to avoid eating or drinking foods that are either too warm or too cold during the time your teeth are hypersensitive.
If the pain is severe, you would need oral pain relief medications too. But do check with your doctor if this pain is due to caries or hypersensitivity in the normal teeth.
Let us know if you have any other doubts and post us about how you are doing.
Regards.
Yep! I just has two crowns put on one of them had a root canal done. They all hurt very hot and cold sensitive...