if you're not sure, waiting is the answer generally. Just keep the membrane moist and check ever hour or two.There are still some fine ones there which were the big dark ones yesterday.
As I've never done this before my concern is if I do it now and they aren't ready, will it cease any absorption they have left to do?
And I'm also afraid I'll cause a bleed.
Second guessing my every thought after my first attempt went so badly.