Crack in tooth shortly after filling. Any suggestions?

You don't mention why the filling was necessary to begin with. It's possible that your tooth was already cracked and your dentist was trying to be conservative by doing a filling instead of a crown and possibly a root canal. Teeth can crack for many reasons beside the ones you listed. I'm sure your dentist will be reasonable with respect to fees charged for additional treatment but it is definitely unfair to ask the dentist to restore your tooth for no charge.

Hi there,I would call your dentist and have them take a look at the tooth in its current state. There are a number of reasons that teeth can crack, and your dentist can probably give you a thorough evaluation and explanation after looking at it. Most dentists today can take a photo inside the mouth and show you. If the tooth is sensitive and broken, that's not normal following a filling and you should return to your dentist to have it looked at.Best of luck!