Can I drink water after a tooth filling?

Hi doctor,

I went to the dentist. She told me that she would fill three teeth. But she found another decay in my canine tooth and filled it without telling me. There was no dark spot or anything on the tooth. I started to have sensitivity on that tooth after drinking cold or hot stuff and if I chew anything. I am worried whether she filled it wrongly or she did not remove the decay. She refilled it today and I drank some cold water to see for sensitivity. But I am worried if drinking cold water after filling can affect it. I am waiting for four weeks to see for sensitivity. Could drinking cold water or a drink after a filling (composite) affect the filling on the tooth? Will it affect in a bad way?