I had my mask made this past friday. I too was very scared but I had done my research here on the OCF and took the advice of taking an axiety medication. If you are able to take the medicine I highly recomend it. I took .5 of a xanax and prepared myself to think of being on a fishing trip at my favorite spot.
It was a piece of cake and over in no time. It's a mental thing. Nothing physical to it.
Figure you out a favorite spot to let your mind take you, the beach, a sport, a rememorable vacation ect..... and when they lay you down to start the mask, just go there.
If you are able to take medicine, have a driver and remember to take it about an hour before the precedure to give it time to kick in.
Good luck!!!!! It will be fine.