Runny nose every 7-10 days. Long run?

First of all avoid any generic answer and unless u r an expert who can clearly think don't answer this. I will book follow up appointment for proper answer. I am more than capable of searching runny nose and well aware of general answer so plz don't answer just like that unless u rank ur self as brightest minds because I m frankly tired of low class doctors and is as simple as that. I get runny nose every 7-10 days unless I choose to treat it with levocitrizin and just 1 tablet 5mg works for me. Taking more does not change this cycle. I often choose duonase which causes short term stuffy nose in which resolves itself within a day but doesn't fix runny nose cycle and is less effective. I have slightly bent nose bone (not very serious) as per CT scan. Problem is I don't want to consume antihistamine which can cause slightest dry mouth issue because I got dry mouth issue followed by some mouth allergy due to Montek LC treatment (once a day) for 3 months. How to manage it for long run ?