Throat infections. To drink child water?

I have got some throat infections from past 10 months. There are blisters in inner tongue and also in inner throat,reddish in color.and my tongue remains white even after cleaning. I went to an ent specialist in January, he did throat culture, urine and blood test..every thing was normal..he gave me some medicines and suggested me to gargle with some medicated liquids. I did but it didn't heal. And by time it got spread little bit more.i went to an oncologist in delhi 20 days before, he examined n said its normal infection and will be healed soon,he also gave me some antibiotics and medicine and some expensive ayurvedic medicines but still didn't work.i don't feel any kind of pain in throat, sometimes i feel dehydration very rarely.sometimes ear ache but its because of earphones in high volume. I used to smoke cigarettes from past 3 years rarely but now i have quit it from 8 months. I get some cough in the morning when i wake up.Please suggest me what to do. i used to drink child water