i'd give it a bit of time still, from what youve just said it doesnt sound like youve got 100% proof yet
( "there is a little spot of new growth where the nodes mmeet "). If you are absolutely sure well, you've got bad luck. I've never seen anyone prove to me that its possible to alter a plants sex from conditions or anything after the seed has formed and its not already determined b4 you even germinate the seed. It's not too far fetched in theory as some reptiles eggs sex can be changed by the conditions and some fish change sex under certain conditions , but ive seen that proven w/o a doubt while all of the many people who ive seen claim cannabis is the same way have never been able to. until that point im very skeptical cannabis can do so too.(dont get me wrong, If someone can prove it to me i'd love to see it. I really would.)