Looks like a heat or humidity problem, my girls curl up like that when my cabinet gets around 87 degrees. Also if I give her a little too much water or if I over spray them they do that so I believe it's a humidity thing. Sent from my SAMSUNG-SM-G900A using Grasscity Forum mobile app
How's she look now? What nutes and soil do you use? Mine are doing the same I'm on my first grow with 14 bagseed girls about one week from flip to 12/12 However with my girls...I recently transplanted into fox farm ocean forest soil and they got a bit of nitrogen toxicity. Super dark green and the random "claw" on leaves here and there like on of your leaves in your photo. I am just going to water for the next week then start nutrients back at qtr strength. Got an update? Source: Nitrogen Toxicity | Grow Weed Easy -420Primo 1000 Watt HPS Seed to Harvest Germ: March 2016 (Active Veg)