dont use nutes 2 weeks prior to harvest, straight water. if you dont know the difrrence in lights the one you should be using for flowering should have a orangy hue and doesnt give off alot of light as to mimic the shorter days
i say you dont have adequate airflow, the plant looks like its been through heat damage i dont know wether you could save them but i would continue trying to save them. If you dont have a fan get one now
female plants tend to go hermie when they are stressed so keep that in mind when you experiment, I cant wait to see the final product Hope you get a good yeild!