The fickle finger of fate at work here....bad luck!
The worst I ever had go male was 5/5 Nirvana's Afghan...fortunately I had a few other strains at that time that went more female so it tends to balance out. This was the only time I ever got all of same sex out of a bunch of seeds. I have gotten 4/5 females a few times even 8/10 sometimes. It is always a good idea to start more plants from a few sources than all one strain...hedge your bets better that way.
Just wait it out. Could be some female calyx primordia. Just let it fill out a little more before you decide to chop anything. But sucks dude, Out of 3 grows so far under my belt, haven't had one single male. I got 10 under 24/0 right now, 7 are female, the other 3 I have to wait and see, maybe this time I'll end up with some males.