Age 38, 1m74 and 80kg, I've been through at least 11 years of severe apnea and just discovered it since 3 month. I've been using CPAP since 2 months 10 days, and easily get 100% compliant with my Mirage FX nasal mask (except the last period when I have had a stuffy nose and switched shortly to a non-compliant full face mask)
But during these 2 months 10 days, the best day of me is still only 70% of my younger self. Most of the morning and noon I find my head foggy and brain processing speed so low, also short term memory is bad.
Is there brain (hippocampus) damage, or is there something I could do better ?
Here is my sleepy head info

My oximeter data is not so reliable, I've used it only 2-3 times.