She'll probably use the box just fine once she starts digging in it. Remember to put more sand + be sure it's dampened with warm water + pack it in the box pretty good.
Well she hasn't laid anything and doesn't dig at all when she is in the bin, she has started to eat a bit again when she's in her tank and isn't always trying to get out like she was, but she still does a bit. Could it not be eggs and maybe her coming out of brumation?