Bob & Laurie,
Welcome to the neighborhood. Believe it or not, you are at the worst point in this journey. Some things to do include elevating the head while sleeping, rinsing out the mouth regularly, get a humidifier close by as often as possible, take Guaifenesin in some manner, either liquid (i.e. Robitussin) or Humibid LA. If you opt for the liquid avoid drinking it or your hair will certainly stand up as you scream because it will really burn the throat.
The brown goo as I call it will subside but it may take a while like a few weeks or a few days. Just imagine Crytal Gayle singing "Don't it make your brown goo clear." because once it starts getting less brown, it will be much better all around.
Hang in there. It will get better.
Ed