alaska49,
Sorry to hear about your breathing problem linked to sarcoidosis. I had to look up sarcoidosis. Sounds scary since the tumors take up needed air space in the lungs. I know the shortness of breath is scary for me. The liver involvement is also quite frightening. I hope your sleep study goes well. If you do need a CPAP machine, it does take some getting use to but also helps a lot to push air into the airway. Eventually, I felt better using the CPAP machine.