yeah, thats the worst when the inner densest bud growth puts out a few male flowers on you, if you dont catch them early they are nearly impossible to find sometimes, even the smallest little bud leaf could have a sack of bananas hiding under it and fuck up everything, I'm not saying this is what happened for sure or anything but like jaw said you've basically described the way it happens alot of the time. I hope we are both wrong, I really do.keep your eyes peeled for any seed production, if it is a hermie they should become quite apparent within a week or 2. youve basically ruled out any other conditions that I can think of that would account for this. hopefully you dont see any seeds and it is just an early finisher.