7 month old has nearly learnt to crawl and is spending most of her time on all fours rocking backwards and forwards. Previously she has been amazing at going to sleep, we would put her in her cot and she self-soothed instantly. Now she is in her cot on all fours for a couple of hours and won't go to sleep. Any tips on what we can do to help her sleep, or is it just something we have to ride out? (she doesn't use a sleepbag/blanket as she hates the feeling of being restricted)