There is a condition called “perennial rhinitis”, which is basically caused by house dust mite allergy, and can cause many of these symptoms. Many people who have that benefit from using inhaled corticosteroids, like fluticasone 50mcg per puff, which are available without prescription in the United States. The starting dose is usually 2 puffs each nostril once daily, and people who find it helps usually find it takes at least one or two weeks of regular use before their symptoms improve or resolve, and if they stop taking it, their symptoms return in a few weeks. So it’s a treatment, not a cure! If it’s not available over the counter wherever you live, maybe discuss it with your doctor?