Try chewing mint leaves.
I'll try that, if I can get my hands on some. I always brush my tongue, and while it is a great suggestion, it hasn't worked for me. I ate an apple an hour after I ate the nasty pie, and I also had one today, which I thought would work tbh, but it didn't. Now that I think about it, it's kind of like like the nasty is in my salivary glands, (on the back of my jaw) not the mouth so much, which would explain why my whole mouth tastes bad if its the saliva, although that probably means infection. I don't feel pain or inflammation, just feels like when I breathe in through my mouth my glands are active, as if my mouth was watering over delicious food. Also, I am not Paperclips
Do you brush your tongue with a tongue brush, though? Because the tongue's really different from teeth so bristles don't really clean it. Also, if you have that thirsty feeling a lot, try drinking more water because a dry mouth doesn't help your breath.