About a month ago. I finished a long journey on restoring my mouth from being completely rotted out. Had a lot of teeth pulled, and the dentist tried to save a few by doing very deep fillings. And i've been brushing, flossing like crazy. But, I'm noticing small brown spots on some, and some discoloration, yellow between my front two teeth. I'm worried that maybe the deep filings did not save the teeth. Should I be worried? I spent thousands of dollars on it. And I want to make sure I should be okay, also. I'm a smoker if that has anything to do with my yellow discoloring that just wont go away whatever i try. I use a whitening tooth paste every day. And, the fillings are right in the middle of my teeth.