The signs of being gravid or becoming eggbound include but are not limited to the following things....
Signs that your veiled female might be gravid...getting wider in the back half of the body, drinking more as she gets closer to laying the eggs, roams the cage, has mustard spots with bright blue dots and gets a dark background color at times. As she gets near the time to dig, she may slow down or stop eating...but then she might not too.
As she is almost ready to lay the eggs, she will dig in an egglaying container (I hope) you provide for her. She may dig several test holes but should settle on one and dig it until she's satisfied with it. She should then turn around, bum down and lay her eggs....likely in the evening. She should fill in the hole, tamp it down and return to the branches.ITS IMPORTANT NOT TO LET HER SEE YOU WATCHING HER WHEN SHE IS DIGGING.
If she passes the time when she should lay the eggs for some reason, she will become lethargic, likely sit low in the cage, may dig a hole and fill it in without laying her eggs, go down hill and eventually die if nothing is done.
If your husbandry has been good and she was/is healthy to begin with, then she shouldn't become eggbound unless there is a physical reason for it (fused eggs, misformed eggs, reproductive system issues, etc.).
Overfeeding constantly can play a part in producing big clutches, constipation, eggbinding, prolapses and even MBD.