Hi.
sorry to hear that .
Few patients experience it, it's common to have sensitivity and pain after restoration, would advise you to wait for 1 week,In case ,if pain dsnt subside and is severe then:-
Get x-ray done,check if the filling is close to the pulp,if it's close to pulp u need to get RCT done followed by crown
Next Steps
Visit nearby dental surgeon for physical examination and evaluation
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Hope your question is answered