I have to take a daily allergy pill evert day year round, but when they get particularly bad it usually means I need to change the hvac filter or clean/vacuum.I already know I have a cat allergy, that's not usually all that bad and clears up after waking up and getting out of bed. This is a non-stop high volume flow of snot. I think this may be from the heater ducts, I know they need to be cleaned.