They usually start to show around 12 days and get larger quite quickly so she may be due soon. She will be fine as young mums are usually good mothers. The key is absolute peace and quiet and only feeding and watering for the first week at least then starting to introduce more contact as you feel she is comfortable with. Don't worry about taming for now as you can tame mum and babies together when their eyes open. You won't be able to do a clean till they are out and about with eyes open so give her plenty substrate and bedding now. I don't really handle mums from about 14 days as I don't want to risk stressing them. It's hard when you don't really know how far on they are though.
You can see the bulges on the hips in this 14 days pregnant mama
36277456_10156138006511690_9196419527934476288_n.jpg
36301764_10156138006526690_2410440057170165760_n.jpg