I am a 24 year old student. Although I am living a healthy lifestyle, I often feel completely exhausted after I get up and tired during the day. I was suspecting poor nasal breathing (what isn't actually an explanation I guess) so my ENT had me do a home sleep study. Results: pAHI of 5, pRDI of 12.3 (pAHI/pRDI in supine position: 12.3/25.4.). Minimum oxygen saturation of 93. He says that those results are completely normal. However, the internet says otherwise, so I made an appointment with an actual sleep doctor, who scheduled two nights in a sleep lab (next week). He also said that it might be very well possible that I need therapy and the second night might be used to adjust the CPAP.
Is there anything I should be prepared for? And what if the In-Lab sleep study is negative?
P.s.: Sorry for any grammar errors (and you are very welcome to correct via PM )