Allen - if your female is already gravid there's no point in breeding. The eggs are formed and nothing you do short of injecting sperm into the eggs directly is going to come close to fertilizing them. It's like a woman - you fertilize the egg before you get the baby, if there's already a baby there's no point in fertilizing, she won't get pregnant again (except in the rare case, I have a cousin that was concieved 3 months into the pregnancy that was his brother.)
Now to the issue of size, if she was large then great, it was probably better. But I still think that you might as well wait until the female has reached her maximum potential size before breeding. This is if you are also keeping her from laying eggs while she is still under a year old, otherwise it sort of defeats the purpose and you might as well breed, I suppose. But back to a woman example, a 13 year old girl could certainly give birth, but there's an added risk with the size of her pelvis - it hasn't grown as much as it could. And serious issues could arise as a result. I've heard of a few cases of here of 6 month of females laying eggs and dying because the eggs did a number of her small insides. I think it just errs of the side of caution, but if you got second opinions and your female was large, then good. I mean, what's done is done and she's obvious fine, but I suggest maybe waiting a bit longer with any future breedings. But that's just my opinion, of course.