PLS HELP

HI!!

I HAVE BEEN HAVING DRY COUGH FOR OVER 3 MONTHS ON AND OFF.. MY ALLERGY LEVEL SEEMS TO BE QUITE HIGH EVENTHOUGH I HAVE BEEN PRESCRIBED MEDICATION (LESTACAN) TO CONTROL IT FROM GETTING WORSE. I SOMETIMES FEEL ITCHINESS ON THE INSIDE OF MY CHEST AND BEEN FEELING REALLY WEAK FOR THE PAST MONTH SPECIALLY WHEN I WAKE UP. OH YEAH AND EVERYTIME I WAKE UP I HAVE I HAVE LIKE DRY SALIVA ON MY THROAT MIXED WITH THICK WHITE TRANSPARENT MUCUS SO I SPEND LIKE 10 TO 15 MIN GARGLING TO FREE MY THROAT.

I HAVE BEEN PRESCRIBED MONTAIR 10MG AND LESTACAN

DOES ANYONE HAVE AN IDEA WHAT IS WRONG WITH ME??? I AM REALLY WORRIED AS I AM ONLY 26 YEARS OLD AND THIS HAS BEEN GOING ON FOR LIKE A COUPLE OF YEARS ALREADY AND I DONT SEE ANY IMPROVEMENT...