I am new to this message board and to CPAP treatmet. I have only been using it for 1 week. Believe me I know how you feel. My only comment is, when you say they are ordering you a new mask to try. I hope that you have researched this mask and feel that it will meet your needs, and they aren't ordering you just any old mask.
I got my first mask; a Swift, when I got my machine. The Swift is a great mask and I like it but I don't like to sleep on my back, and I can't make it work when sleeping on my sides. So, I ordered a different mask after reading about 3,000 reviews (ok, maybe only 1,000) of different masks, and tried to pick the best one for me (side/face sleeper). It pays to do some investigating on your own, and TELL them which mask YOU want to try.
Good luck to you I hope we are both happier soon!