ok your problem is that you gave it nutes too soon, for the first 3-4 weeks of life a marijuana plant needs WATER ONLY. this one is already extremely stunted in growth so i would start fresh with a new plant because you also may have already turned this one into a boy by stressing it. when a plant is 3-4 weeks old thats when you start feeding it with a 20-20-20 formula. make sure you follow the instructions for INDOOR plants. also i strongly suggest going to greenmanspage.com and read ten biggest mistakes growers make it really helped me out in the begginging.
GOOD LUCK