Sorry to hear about the loss Joanna. Sometimes that kinda stuff happens.

Since you said that 2 were found dead at birth, I figure you checked on the right after birth. I try to avoid that as much as possible to limit stress on the mother. In fact, once I notice that babies are born the only thing I do to the enclosure for the next 9 days is refill water and add food. After that I do a slight cleaning and a quick look under the hide. Then 2 weeks after birth I do a complete clean and look over all the babies. I just wanted to let you know how I do things, it might be some help

I use carefresh bedding. I get the really big bag from petco for around $20 and it lasts about 3.5 weeks. When my moms start to 'golfball' i put a bunch of strips of newspaper in the enclosure so that they have something to build a nest out of. Also, I use old boxes from around the house as hides....so I can just throw them out after they have been used for a week or two...the one in the pic was a snack bar box