@lisawuriu The lowest setting on a CPAP machine is not therapy. The lowest setting is for 'pressure relief', such as when you want to relax and exhale after an intake. Some people find that the constant pressure, unchanged between inhalation and exhalation, is uncomfortable, and it's hard to breathe out. So, the engineers designed the programming to allow sensing of when you are about to exhale, and the machine's fan slows a little, meaning less flow. This is 'pressure relief.' However the heavy majority of PAP users need to have their machines deliver about 8 cm of water pressure, and from there it backs off two or three cm of pressure to allow you to exhale comfortably. Many users need far more pressure, though, even up to 18 cm H2O.

Your dizziness suggests to me that your machine was not set at the correct delivery pressures. Yes, it is bothersome, yes, it takes getting used to, but with some practice and perseverance you can enjoy sleep in comfort and not have to fear endangering yourself with hypoxia, low oxygen levels.

I am not a respiratory therapist, and not otherwise medically trained. I do use a CPAP machine and was able to 'take to it' right away...lucky me. I was advised to wear the mask AND hose attached much of the first two days (in the house, of course) and get used to having it on, but also breathing through it and hearing the sounds. By the second night, I just didn't care and wanted to sleep. I did find I have to tape across my mouth because my lips lose their tone and the forced air wants to rush out of my lips, which negates the pressure therapy that it meant to go down my trachea. Other than that surprise, and I have taped every night since (eight years now), my machine reliably delivers great therapy and my 'events' of hypopnea and apnea now run about 0.5 an hour, far below, and better, than the 30+ events of obstruction I experienced before diagnosis and during my titration in the sleep lab.

You must seek help with your PAP machine and deal with its complexity and your suspicions or past experiences. The alternative is something very bad. It's up to you, of course, but I would hope to encourage you to find some motivation and to put it behind you.