First trimester, she's asleep by 8, and I don't know what helps beyond making dinner

We haven't told family yet, so at home we're working this out on our own. My partner is exhausted in a way I've never seen, asleep by 8 most nights and slow in the mornings. I've taken over dinner and the weekend shopping, which she says helps. Beyond that I'm guessing. I asked 'how are you feeling' so often last week that she's started answering with a number out of ten. Yesterday it was 'six, please stop asking'. For those who've been the partner in these early months, what turned out to be useful, and what was just hovering?