First night on BiPAP was great, but subsequent nights were not as good

[LandonLe5]

I have been using CPAP for a little over a year (ResMed AirSense 11 Autoset) and I have never felt well rested and found myself always incredibly tired throughout the day. Just last week (Feb 21) I purchased an AirCurve 10 VAuto after watching several LankyLefty27 videos on youtube and thought I might have undiagnosed UARS. On the first night, I set it to basic VAuto settings to try to establish some sort of baseline: IPAP max =14, EPAP min = 4, PS=6, Trigger=Med, Cycle=Med, TiMax=2.0s, TiMin=0.3s. I woke up more refreshed, brain fog disappeared and I did not have any urge to fall asleep during the day - needless to say I was incredibly happy and excited as I had never felt like that for as long as I can remember. The 2nd night, I tried to titrate the settings a bit, put the machine in BiLevel-S, IPAP=11, EPAP=6, Trigger=High, Cycle=Med, TiMax=2.2s, TiMin=0.3 and again I felt great. However, the subsequent five nights, I have not had that same feeling; I once again felt tired during the day and felt the urge to sleep, though not as much as when I was on CPAP.

I was hoping that someone might be able to provide some insight and/or suggestions on how I might improve my treatment and if what I'm experiencing is normal. I have posted a screenshot of the Oscar data for the first three nights.