First I also love those yellowheads, LOL I'm waiting on some of mine to make me lil yellers.
Anyway as far as your girl,I know you said she has a large tank and comforts,
but did you actually make her a laying box, or nest? Let us know on this one, if not have to do that.
Are you sure in that amount of time, that she could have just been orange (ovulating, but had not bred, and then later she did breed, takes about 24 days?
Has her appetite decreased, like it should near laying time?
Has she been digging, excessively?
These are all questions to think about.
There are only 2 things that can happen IF she does not lay.
1. She is going to re-absorb the eggs and soon her size will decrease and orange will slowly fade. And will return to normal.
2. And worst case, which I hope does NOT happen, she would be eggbound. Which there is not much you can do. A Vet would need to try and remove them, IF you would go that route.
Lets all hope she lays real soon and does fine 
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Eve