Temporary switch to full face mask; fighting the mask to breathe

I've used nasal rigs the entire time I've had a CPAP. Pillows, nasal mask, and currently a DreamWear.

Had turbinate reduction last week, and since there's a period of congestion during recovery, I got a full face mask from my sleep clinic.

It's a battle to breathe with it, even after adjusting the settings (Resmed Airsense 11 lets me select nasal or face mask). Not a mask comfort issue; I'm used to headgear. I'm fighting the pressure; it's almost like being on a ventilator, it's brute forcing me to mouth breathe, and exhaling especially is work.

I've noticed that I'll get into a good breathing rhythm, and *just* as I fall asleep, when I stop thinking about my breathing, I suffocate from sensation of a hand over my face, blocking breathing, and snap awake.

I didn't experience this with nasal rigs. Is this normal with full face masks? Is there anything else I can adjust?