hi olive, i have had days of full anxiety over sleep too. it's so horrible isn't it?
are you talking more about day sleeps or night sleeps? i have found on days where i'm fighting with ds2 to get him to sleep i just pop them both into the car, go for a short drive to grab some milk or a coffee or something and by the time i get home he is asleep. then i transfer him from car to pram and wheel the pram into the house and leave him asleep in it.