every morning i brush my teeth, but an hour later theyre yellow again and my breath smells again even if i havent eaten something. my mom said it was because when i was born, there was this thing in my throat, and it does that. but the doctor said it would get smaller as my throat developed. but now im 12, the year it was supose to be gone but its not. its still making my breath smell bad after an hour and my teeth yellow after 2 hours. whats wrong?