I feel it's more likely than not when BD's are well taken care of. Of my 3 unmated females this year, 2 hatched 8/5/07 and one hatched 5/1/07 one of the females hatches 8/5/07 laid 4 clutches of infertiles while the other 2 never became gravid. The 3 live together in the same enclosure so their conditions are identicle.
All my older females have mates and laid fertiles.
If she's eating I'd say your fine. Just make sure you give more than enough calcium and water. Shelling takes a lot of calcium and they pull it from their bones if the supply is inadequate. I'd offer water from a dropper. How much is "a little bit of crickets"?