Hi, Jimmy. Sorry to hear about your challenges. Zonk's suggestions seem like good ones. Forgetting to inhale sounds like you are possibly having Central Apnea events where the brain fails to send the signals to breathe. If you were using software, it would be possible to see if your sleep data showed open airway (possibly Central apnea) events or if you were having obstructive (regular) apnea events that woke you. I don't have any problem with Central apnea myself, but I have, on just a couple occasions, been awakened because I wasn't breathing due to obstructive apnea--scary.
With a full face mask, one need not worry about mouth breathing, since the mask covers both nose and mouth. Even if your mouth is open, you still get the machine's full pressure (full therapy).
As for leaks, check to make sure you don't have the headgear (straps) too tight. Having them overtightened can collapse the seal part of the mask and create leaking.
Thanks for the input. I do not have a sleep doctor just a GP who is not very informed on subject. CDL physical is what started all this I did not think I had a problem. In the middle of the night last night I figuured out how to change pressures and set inhale to 11.5 and exhale to 8 and swapped to a hybrid mask.Slept well from 4 am to 7 am.Machine has SD card but do not know how to use it yet.Well off to work I will will stay in touch.Thanks again