Well don't cull it yet I would definitely not waste a good plant and good pollen, that stuff is like gold plus there is no better feeling than growing out seeds that YOU made and they don't exist anywhere else on earth its pretty cool. Wait to see if any more sacs pop up and if not she will give you some buds
Nah man @FastBuds is top notch as far as their genetics so the hermie you got is probably 1 in a 100 I would not worry about getting another one.