lost,help me

people,i need you guys help !! sincerely,i've post nasal drip (pnd)..for alomost a year already. the most important thing is i've halitosis because of this...since the pnd can serve as a food resources for the oral bacteria.. but the strange thing from wat i read frm forums..some people with pnd don't have halitosis...so i'm wondering is there anything to do with my oral flora?is there any way that i can restore my oral flora?? anyone here who's studying on microbiology?? can u please help me to clear my doubt?? is there any solution for this problem?? or maybe some list out what will be the cause of pnd besides allergy,adenoid infection, sinus infection,nasal polyps?? people,i need your help!! it's been years i suffer from this problem. i want to be sociable just like anyone of you here... thanks for reading this post,any feedback is highly appreciated. thank you.