I place my C-PAP on the floor by my bed (on a towel), because I pulled mine off the first night also. I don't put mine on until I feel I am going to sleep, it seems to help, it also may take a while to get the right mask or nose pillows, if you are still having trouble with it after a week - call the people who set you up with the machine and ask for a different mask, the nose pillows worked best for me. I am getting the best sleep of my life now, no waking up in the middle of the night (2-3 times) to go you know where.
Good Luck!!