Halitomin, opinions and questions

Hello. I have a problem, because for a long time I have been constantly flowing thick secretion on the back wall of the throat, which I have to spit out (especially in the morning). Unfortunately, this is associated with an unpleasant smell from the mouth, and sometimes from the nose, a yellowish coating on the tongue is formed and also causes dryness in the throat. I have all my tonsils cut out, I did swabs (throat, nose) several times, once Staphylococcus aureus came out (about 5 years ago), then coagulase-negative staphylococcus, and now nothing comes out from two or three swabs. I am convinced that it is not an allergy because people in my environment also have it. So it turns out that it is some kind of bacteria or fungus, I heard about PCR swabs in this direction, unfortunately they are quite expensive and they are done privately. This is not bad nutrition, none of these things I tried to put everything off without effect. I can also add that alcohol increases the raid on the tongue. So the question is, what are the next steps should I take?