Hello @usmccam, I have been using a CPAP machine since last summer and have went through quite a few different masks trying to find something that works for me. I'm wondering if that might be part of your problem of the suffocating feeling with the BiPAP nasal mask.

There is an active discussion here you might want to read where you will meet other members using a CPAP/BiPAP machine and learn tips that they have shared. @thankful, @cece55, @jjspokane61, @dawn_giacabazi may be able to share some suggestions to help with your BiPAP machine.

Groups > Sleep Health > Cpap and sleep
-- https://connect.mayoclinic.org/discussion/cpap-and-sleep/

Have you discussed with your doctor that the mask causes you to feel suffocated? I would see if there is another alternative for the mask or nasal pillow you currently have. It's the key piece to helping a person use the BiPAP or CPAP machine and get the sleep the body needs.