Wait a bit longer...I guess.

Back molar that got a filling still absolutely does not take well to cold drinks. 

"Tooth Sensitivity After a Filling"

https://www.hovedentalclinic.co.uk/blog/tooth-sensitivity-after-my-filling/#:~:text=An%20irritated%20nerve%20is%20not,and%20cause%20uncomfortable%2C%20sharp%20sensations