Should i be worried about a deep filling still hurting at cold/hot temperatures or after i chew gum? it's been a month. i floss daily to help it heal.

Yes: There could be a number of reasons for your tooth still hurting. Since you stated that the filling was deep, the pulp could be irreversibly inflamed. If that is the case, it would require rot canal therapy. However, there could be other reasons, such as the occlusion being high. I would suggest going back to your dentist and have him/her evaluated the situation.

Concerned? yes: This can happen but is not typical. Most often with these symptoms, the tooth will require root canal therapy in time. It still might not be too late to prevent the need for rct. I suggest that you return to your dentist to have the tooth re-evaluated. Sometimes when the filling is removed and the nerve sedated, one can avoid the need for rct.

Yes, : Return to the dentist for further tests including x-ray, percussion, pulp test, cold test. If the intense cold pain lasts more than 30 seconds after the cold stimulus is removed you probably have irreversible pulpitis, the treatment for which is root canal therapy, .

Time will tell???: If it gets better (slowly) just give it time. If it gets worse it is probably inflammed or worse. I would check with the doctor that put in the filling and get professional advice, especially if it gets worse.