Talk to Ent Specialist on Mucus Mucus And Lots Of Mucus

Hi. Since a couple of years, whenever I get cold or viral infection I continue to have excessive mucus even after my medication course is completed. If I talk about the most recent time, I suffered a viral infection and I took Kestine (2 times), Azomax (1 time) and Prospan syrup (3times) for 5 days. My fever and viral infection ended but it has been around 2 weeks since then and I still have a lot of mucus (clear and transparent, almost like saliva but it is sticky). It seems like the more I take it out, the more it increases in my throat. I am tired of coughing it up and it makes my throat hurt. I cough it up so much that I had to use 5-6 whole tissue boxes in these 2 weeks. The mucus sticks to my throat so I have to keep clearing it otherwise I feel that it blocks my airways and I am unable to breathe properly. It gets really bad at night (or may be I feel more throat itchiness at that time) and doesn't let me sleep.

I dont know what to do about it. Nobody understands what this is