Suggest Treatment For Dry Throat, Difficulty Swallowing, Constant Coughing And Insomnia

Hello, I am 18 years old and are a regular smoker. I smoke since I was about 15 and started with 3 to 5 a day and now smoke 10-15 but are seriously making some efforts in order to quit. It s been about 2-3 months that I have been experiencing the following symptoms: dry throat (somewhat regular), difficulty swallowing, occasional but constant coughing with sometimes pus coming out, minor breathing difficulty, ear wheezing and nocturnal transpiration and insomnia. I saw a doctor after recently the dry throat became really sore and was accompained by some fever, and I was told that I probably had tonsilltis. However after I was given antibiotic and got better, some of the original symptoms came back and now I am genuinely worried that I might have throat cancer. I also add to that, that I hardly ever consume alcohol and have a good and regular dental hygiene. It would do me a big favor to be addressed with an answer as soon as possible as I am starting to get quite concerned and anxious about the issue. Thankfully yours.