"2) she is forever going into the water and drinking it."

That behavior isn't normal for a desert dweller. Check your humidity settings and make sure they have humid places (moist burrows/hide holes) to disappear into. Desert dwelling lizards generally gain all water intake from the food they eat. Organ failure generally occurs from being dehydrated. Are you using a screen top enclosure? Those are lizard killers, they are commonly nicknamed as beef jerky makers. They are great for drying out the enclosure and your lizard. Dehydration is one of the top killers in captive reptiles. If you are using a screen top work on covering it up.

Hopefully she is gravid, but this something to look into.