Being awake during the day just doing nothing in particular.. is concerning as it could be sign of many issues, and yes, it needs a vet visit.
The 1st thing to do in any case is always to make sure she is not dehydrated (tent test).
(On the other hand, if she is hosted with an intact male, there is a possibility that she is giving birth, my female often gets out of the nest for that, and is either sat in her wheel, either hanging with one hand while licking around her pouch and cloaca.)
But I would definitely get her checked by a vet anyway.