Why Provigil?
Not sure whether this will help but I took Provigil for over 12 months to overcome fatigue and muscle cramps. I was diagnosed with multiple sclerosis in Feb 97 but my flying days now over.
It DID help me off to sleep but there were a couple of unpleasant side-effects. .. may I suggest you read a copy of the explanatory leaflet supplied with that drug?
Anyway..... good luck with your problem.... work cycles should not be like those you describe! bm