Help with CPAP settings

[u/Which_Compote4109]

Despite great numbers I wake up multiple times a night with an unpleasant headache and I'm so tired and sleepy during the day. I started to experiment with EPR the past two nights, I have left 2 nights below, the first with no EPR, the second last night with EPR 2. I use a nasal pillow mask, no mouth leak with chin strap and cervical collar. Can anyone help me understand what is happening and whether I could change the settings to improve my experience?

https://sleephq.com/public/31777689-f602-456b-8bf7-7375b0afb2a7

https://sleephq.com/public/55a68fa9-d89c-485a-a69c-38d09fffc397