Silent reflux can cause throat and back-of-nose irritation without heartburn pain. I have a hard time distinguishing the onset of a cold from the occasional bout of reflux. It can also cause pressure in my ears due to irritation of the eustacian tube. It took me a while to figure that one out. If you're sitting around more, snacking late in the evening, or eating more fatty foods than usual (welcome to lockdown!) your discomfort could be digestive in origin.