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It sounds quite sudden that she has started this behaviour so I would take her to the vets to be honest especially if the pups seem unwell. It could be something like mastitis and the infection would affect both her and the babies. It is worth the risk to try and get her though this and you will need to take everyone in the cage I imagine.
Maybe phone the vet and ask their opinion. Under the circumstances they may be willing to prescribe Baytril for at least mum to see if it does the trick. Personally I think 2 weeks is too young and you will need to hand feed them for another week anyway. Mum does lots of jobs other than feeding like cleaning and stimulating the pups to wee and poo as well as clearing that up.
Ensure she is hydrated and the bottle works and also the pups can drink as this is a common cause of these symptoms. Give the babies extra tiny cubes of cucumber to provide drinks.
I hope she improves soon x