Did the home sleep study monitor heart rate and brain activity too, or just breathing? I ask because my excessive daytime sleepiness is caused by a combination of a weird heart thing (not dangerous, but it keeps waking me up just enough that I don't remember it but that it keeps me from getting restful sleep) and a neurological sleep disorder where my sleep phases are the wrong length/out of order/don't go into deep, restful sleep naturally.

I don't know if they can monitor those things at home--I had to spend a night in a sleep lab to have mine done. Mine's only partially treatable, but it helps to have an explanation other than "I'm just lazy."