Morning & night time Sore throat 6 years

I have been suffering from sore throat since >6 years now, mainly in the mornings and night, wake up with a blocked nose and sore throat. It does get worse if I have to sleep with the fan on for someone else. Need to gargle with hot water and clear my nose once in the day as well. After meals too, there is often increased mucous production which keeps coming back if I swallow unless I spit it out. I have been suffering from chronic gastritis and reflux since 1.5 years but this issue has been since 6+years. Also have a deviated nasal septum and history of vertigo and tinnitus. Is there anything I can do apart from treating the gastritis and hot water gargles? It takes up upto 50mins of my day in total to clear the phlegm and mildly blocked nose by brushing and hot water gargles. Thank you.