If your doctor tells you to do a sleep study, do it. If, as a result, they tell you to get a CPAP, get it. Those things are life-changing. I felt like an old man at 50 years old. My back was so stiff I couldn't put on my socks. When I got out of bed in the morning I felt so fragile, like my joints were all inflamed - especially my Achilles' tendons. I was too tired to do anything beyond 6 pm. Now, 51, I feel totally…
A lot of it is comfort. So try switching from a full-face to nose pillow-style mask. Or alternative headgear. Or even talk to your doctor about lowering the pressure if it is the noise (better to have less effective treatment, than none at all).
PS - A lot of, frankly, older doctors are still not prescribing Auto-CPAPs for people who may be suitable. If you're currently set on a fixed pressure, and your machine is a common Auto-CPAP (variable pressure) maybe seek a second opinion from a different (younger?) doctor. Auto-CPAPs are medically certified for many Sleep Apnea suffers, doctors just haven't adapted or haven't been re-trained, so they're chronically under-prescribed. Auto-CPAP improves your comfort, not your treatment, which improves adherence.