One thought while you are helping out with the household chores - you might think that having little granddaughter to stay with you for a while after she gets home would relieve her of some of the work, but in a similar situation I wanted to have my children back at home with me, to cuddle and look after. Go by her wishes.
I was told (fifty years ago) that one in three conceptions doesn't make it to full term, a lot of them before they are even confirmed so that it just seems like a rather delayed period. With the average family now being about 2 children, that means that many women miscarry, and some more than once, so it is an experience that is common to mothers.
Why should it not be shared on GN like the other experiences that are posted about? The majority of mothers go on to subsequently have healthy babies - and sharing that fact too could bring comfort in someone's grief.