Food gets caught,and having some pain. Is it a bad fit?

If you are having pain, definitely go back to your dentist and have him/her take a look. As for food getting caught, it could be an ill fit depending on how long the crown has been there. If it's a new crown and food never caught in the area prior to the crown being placed then yes, there is probably a problem with the fit. You should go back as soon as you notice the problem.