I'm so sorry you're sick! Probably nothing you can do tonight, but if you had a full face mask, or just a mouth mask (have one, hate it, never use it ) that would be an option. One idea to keep your nose from stopping up, us to put a glob of Vicks vapor rub, or Eucalyptus essential oil, or similar, and put it in a shallow dish behind the bi-pap machine where the air intake valve is. It will bring the scent through your bi-pap hose, but then when your cold is over, I don't know how long it will take for the lingering odor to remain inside the hose. I have used scented oils before, just for comfort, and the scent really does come into the mask where I can smell it.
About the PEG pads, I commented on the picture (that you commented on) or, just go check out the thread about it on the "tricks and tips" forum here.
I hope you're better soon. Good luck sweetie