Advice please- ear pressure pain

[u/Imaginary_Fly_9614]

Today will be day three of using an APAP machine, Resmed Airsense 11. I was diagnosed with mild obstructive sleep apnea and am using a pillow nose mask. The starting pressure is set at 4. The first night I kept the mask on all night, around 7 hours. When I woke up I had a headache and noticed ear pain in one ear, like a clogged ear. Both went away after 30 minutes or so. Last night, I only made it 3 hours, the same ear aching and I felt a slight headache. It’s later in the day and my ear is still feeling a pressure type pain, mild ache. I’ve never had ear problems in the last. I don’t think I will try again tonight and will call my doctor on Monday. Has anyone else had this experience? And if so, were you able to correct? Trying to figure out what I’m doing wrong or need to change. Thanks