My DD is 5 weeks old and for the second day straight she's gotten into a strange cycle. I need help figuring out how to get her out of it - that's where this board comes in

She falls asleep while nursing not having eaten enough and all attempts at waking her up fail (she wakes up, I put her back on the breast and then she's a sleep 3 sucks later). She sleeps for 15-20 minutes and wakes up (presumably because she's hungry), then again doesn't eat enough and falls asleep again. REPEAT on what seems to be an infinite loop.
I tried different wake-up techniques, tried nursing her in a different room, tried getting her undressed, tried not letting her sleep, tried feeding her milk from a bottle, etc. nothing seems to have worked so far.
What do I do? (other than stay on the couch all day and watch her sleep, which is pretty satisfying for the first 4 hours, but I have a second kid

TIA!
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