Ok.. you look and sound pretty informative and knowledgeable. I am certain that you wont have any herm's. Its too early in the flower phase and you gained control of the situation before it got bad. The 1 main thing that causes a plant to herm during flower, is the interruption of the 12 night hours. You didn't do much to disturb that. It sounds like you gave em a few more than the norm, but that wont hurt anything. Just keep an eye on your timers and be wary of it happening again. If it happens more towards the middle of flower, then you may have a problem, but you should be fine...

Good luck!!