I have extreme postnasal drip which causes a choking feeling when i recline and it's been keeping me awake at night, and been an issue for a while as i have a visibly deviated septum. i've tried flonase with zyrtec, xyzal, allegra. also a neti pot?

You are doing symptomatic relief, you are better off reducing chances of aggravation of the sinusitis by regular linen wash and dust reduction to the minimum. Deviated septum is not as much problem as the irritation that causing increased secretion in the upper airways. You may also change how you lie to sleep so you are less likely to wake up and weight management may be necessary if you are over