Hi there Suziequeue. It's great being retired
For your ewe, there's some wonderful stuff our vet used to dispense as simply 'pink mixture' for drying up the runs. It's now sold under a proprietary name, but our bottle's out in the shed and I can't remember the name offhand..... It's along the lines of 'Kaolin and Morph' for people.
Lambs can absorb colostrum for 24 hours I think, although of course the earlier the better, but it sounds as if they are doing fine now and it's just the ewe who's down.
Have a listen to her belly to see if it's sloshing about, and listen with your head against her side for bowel sounds - all the normal rumbles, squeaks and gurgles we all have. If it's silent then you need to get things going again with Digestive porridge given in the side of her mouth with a large, needleless syringe, and rehydration mix of 1 teasp salt and at least one tbsp glucose powder or sugar or honey in a pint of warm water, given every hour if at all possible.
I think it's well worth giving her Calciject too - if it's not needed it does no harm.
Appetite tempters are greenery such as young leaves of cow parsley, ivy, hawthorn, willow and other edibles, also digestive biscuits once she's perked up a bit.
As always, someone else will come along with some ideas as to cause and how to treat gorging on nuts, and of course you can phone your on-call vet for advice now.
Good luck with her