Bad sleep even with good ahi and very little leaks

As a follow up to my last post here, I did try upping the pressure(from 6.8 to 9), and using mouth tape. I think it worked with the leaks, mainly the ,leaks occuring in the start of my sleep, but there is always some leaks right before I wake up around the 4-5th hour. I don't get why really. Been waking up with some sort of headache...It's not really an ache, more like my head is inflamated. I'm atacching the oscar of the last few days. Notice I go back to sleep after I wake up after the 4-5th hour. Also, I added EPR to reduce flow limits 95% from 0.15 to 0.03