Being maarried to a shift worker is HORRIBLE and I've had it for 13 years now, thinking it was just me feeling like this!
The lack of ability to plan ahead (his shift rota is published every three months and towards the end of that period we don't know what the next shift rota looks like so can't make plans beyond the next week).
Inability to plan meals - cooking for yourself after the kids have gone to bed and then having to cook for him all over again at 9pm after a long day when you've done everything else.
The worst thing is the weekends - especially when they get monday and tuesday off work to "compensate" while you've then actually got to work monday and tuesday. I really, really sympathise - I only got through it by planning my days in short chunks and making sure we were out of the house most of the time.
Oh yes and when they work weekends you don't get any sort of lie-in! My husband can work 4 weekends in a row, which means I'm up at 6.30am for a full month. It doesn start to feel like you're a single parent (though I don;t mean that to play down what it's really like for single parents).
Do you have any family help? My inlaws have been next to useless and I do resent that. They will only ever invite us for a meal on the odd weekend when DH isn't working which means that (a) they don't appear to understand how lonely we are when he's not home and (b) they want to swallow up what little family time we do have.
Fortunately, our days of shift work are about to end as DH has a new job, however, I will never forget how hard it was to combine this with parenthood. Nobody will understand unless they've done this themselves.