It’s all quite annoying.
I had a sore throat for sometime that mostly exists in the morning or when I eat bad food. I got oral pro-biotics and since it has almost disappeared. I scrape my tongue, but the very back still has a layer of white that wont scrape off.
I have a runny nose from time to time especially when eating or drinking alcohol.
I’ve had my fair share of antibiotics in my life especially when I was young and getting tonsillitis a couple of times a year.
The first time I started noticing it was maybe 6 years ago when I went to travel over to south-east Asia and also had antibiotics due to getting an infection from the sea water in a cut.