Sorry to hear, but glad sometimes you can get good sleep.
Waking an hour earlier than you want, with wired and tired, is for me is due to Insulin Resistance leading to a Hypoglycemic reaction. Well sort of; I don't go hypo 'cause my body pumps out cortisol/adrenaline to ensure I'm good. At least I believe that's the case as if anything I'd be hypo. For me I can tell when I'm tapping into the stress chemicals for blood Sugar as my ears ring.
Anyway, using a strong hypoglycemic diet cures that but only if the rest of my life is without big stresses. Considering your hubby's career the last one may be tough for you.