Struggling with bad breath?

Folks,i am now a by-force quiet person.I dont want to make friends,go on relationships,find it had coping with my cashier job,mostly with this ununderstandable bad breath am facing.I practice the best oral hygiene,scrap,brush,rinse my tongue even with acclaimed products like Dr Katz's but whenever i stop or even in the afternoon,i realise my breath has become offensive.I just dont know what to do.With my oral hygiene practice,i personally give myself A++++++,and also my diet to.I visited an ENT specialise who checked on me,but strangely that day i went for consultation it didnt show up.Now what do i do?I want to try this so-called bad breath specialist,but my question is what actually does a bad breath specialist do that is different from an ENT specialist.Also,am scared of the bill that i may be slapped with because am uninsured,what can do or could consulting this type of specialist be so expensive?I need rapid advice to help eradicate this problem once and for all.