My whole life revolves around my bad breath

I have really, really bad breath. I work in a large open area and you can smell it over the entire area.

I try not to breathe when I'm close to anyone (and I get so light headed). It smells just like stool most of the time and sometimes like sulphur.

My Dentist said my teeth are fine, but when I exhale thru my nose it smells just like stool. Everyone talks about me as if I can't hear them and I want apply for any position at work because that would mean being around different people and trying to explain or not explain what that awful smell is.

My breath is on my mind ever second of the day. It is all I think about. I feel as if I am losing my mind. I can't go on much longer this way please help me.

All alone in a crowd