is she due to drop yet?

Ive been up for a week camping at my yard waiting for foal
think I attached pics not good at this





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She is 332 days she has a bag with a sticky cloudy substance when her teets are squeezed so i'm assuming this is colostrum. Her belly has dropped down not so round looking, her vulva has relaxed and there was a little bit of liquid coming out last night clear stuff and this morn, her hind quarters are relaxing. Any idea when?

Taken today picture of her teets bit blurry sorry

You might have better luck posting this in the horse breeding section. I've never bred so sorry but I can't really help, compared to other photos of mares on here though her rump and vulva don't look relaxed enough yet.