Mouth feels weird

[datara]

My prescribed pressure was originally 6, at 6 I went from 79.6 AHI pre therapy to 5.2, pressure got bumped to 7, AHI remained the same, then bumped to 8, and still consistant, but after being at 8 I started waking up with a weird sensation in my mouth and nose, not really sure if can call it dry, but weird, 7 definitely felt the most comfortable, but at the same time I didn't feel like the machine was working, I kept checking to see if there was airflow, because it didn't feel like I was exhaling against the flow like it did at first.
Instances of leaks were also consistent except at 6, probably because I was still getting used to it (never thought I`d get used to not being a mouth breather)
I know if you open your mouth you will get dry mouth but wouldn`t the leak incidents increase
as for my nose, it feels like it`s been Japanese water tortured all night right on lower part of the tip

Thanks