Yes, it definitely sounds like there is an issue to be resolved in that area. Its possible that you may have alot of tartar/plaque buildup in the area that results in bad breath. It may also be the filling. If you have a crack/leak in the filling, there could be a cavity that bacteria is growing in and producing bad odors. It could also be both.
I would recommend seeing a dentist to see whats causing the problem and to see what the proper treatment should be.
also, the floss seems to get stuck when I got by this tooth with the filling. it starts on the top edge of my tooth and then goes down half way on my tooth.