hi,

im only new myself, but my advice would be to lay off the nutes altogether, and flush the soil( if u havent already)....give them a week or so and see if they recover.
once u flushed them with water, they wont need more for quite a few days, even a week or so looking at the size of them.

i think its just a case of wait and see.

its way way to early to tell sex.

im just a beginner also, tho, so i may be wrong.