Angry, need advice

This one is probably simple. It is 4am and I'm downstairs seething. I can't go back to sleep. I woke up, bad dream or something. The fan rattles, and I can't go back to sleep. My wife asks, what am I doing. I said, the fan is rattling, I can't get back to sleep. She says "Glad you can't get back to sleep, your daughter woke up vomiting" I am thinking she is upset that I did not get up and help. I'm like "you did not wake me up". Honest I did sleep thru that. Told her "If you want my help, you have to wake me up". is this too much to ask, wake me up. I'd gladly get up, without complaint. I don't get this. I'm pissed as hell. She gets up, tells me my ass gets to sleep in tomorrow (I have the day off tomorrow, I work demanding job), but she has to work, for me not to keep her up... I tell her she has to stop the smart ass remarks. She gets up and goes to my kids room to sleep. I'm downstairs cause now I can't sleep (read: angry). How am I accountable for something I did not wake up for, how is she so sweet sometimes, and so selfish and bitter other times? How do I communicate without telling her to grow up... which will piss her off to no end?

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