Sleep Apnea Treatment

Two or three hours after I’ve fallen asleep, my boyfriend sometimes calls me on my cell phone, which I place right near my bed. According to my call log, I usually talk to him for 2 or 3 minutes (general, coherent sentences so he says), but when I wake up the next day, I have absolutely no recollection of speaking to him or of the phone ringing at all. This concerns me because I would like to be in control of my actions always, and this is a recurring thing (almost every time he calls at night). Please help! Thanks.

I have taken several overnight sleep studies and I spend either NO time or very little time in stage 4 or REM sleep. I want to know if this is why I am so tired everyday. I also want to know if this is a specific disorder and if so what is the treatment?