We need a little more info bro. What brand soil/medium? Were they from seeds or clones? Light source? Any more info would be helpful but I'm leaving toward some sort of toxicity. Over watering would be more of droopy leaves. However, your leaves looks wrinkle and twisted. Good luck trying to bring her back homie.I have 5 plants growing. all are in the same growing medium. can someone tell me what this is? is it over watering or n tox