Give her plenty of good food and fresh water and some peace and quiet. Once she has settled down, check the kits to make sure all are alive and healthy looking. Count them as well. If she has already fed them, their bellies will be quite rounded. She may not feed them right away; it depends when her milk comes in. They should certainly have been fed by tomorrow morning.
Take her a nice healthy treat like a slice of apple or whatever she enjoys most and give it to her to eat while you check the kits. You can take the nest box right out if that is easier. She should pull fur but depending on your weather she may not pull much. The kits should have fur under them and be lightly covered in hot weather. In cold weather they need more.