I have halitosis issue for 8 yrs.when i get up in morning my mouth sometimes full of stinky saliva which i spit out and sometimes i have metallic taste and bad smell.i maintain good oral health by brushing and flossing but my tonsils are the reason for this,when i touch my tonsils and smell it then it has strong foul odour.i also remove a tonsil stone but it didnt work and clear my breath.tell me what should i do and tell me about medication