Weird new aftertaste when eating certain foods (since some time last year)

[ConstantWorrying 8]

Whenever I eat certain foods, I tend to get this milk-like aftertaste that I never used to get.

What would cause this? GERD? Esophageal cancer? Throat cancer?

As I said last year, I have had a few instances of waking up with acid in my mouth since the start of 2019. I have also had problems swallowing at times when eating, but this comes and goes and seems to occur when I'm transitioning from eating one type of food to another. I have also had a clicking in my throat when I swallow since (I'm serious) I woke up after a dream where I was screaming at a vending machine. Ever since then, the clicking never went away. Something's scraping against something there. I think this was in 2018. 

[MARC 431]

I have a clicking in my throat and ears quite often and my ENT physician said it is due to allergies, post nasal drip, sinus issues and the like. A weird aftertaste could be due to GERD or sinus issues.