I also have severe obstructive sleep apnea,
and use a CPAP at night.
The provigil does keep me from napping during
the day,
and I take it when driving longer distances. I would caution you that taking a stimulant does not make up for lost sleep, it may work for a couple of weeks, months or so, but the lack of sleep will come back and manifest itself and make things worse. You should get treatment your sleep apnea.