Too much nitrogen will lock up a plant, burn its roots and kill it eventually, or you'll kill it because it will suck. what you're going to need to do is flush it with a mixture of peroxide and water, 1/2cup (3%)peroxide to every gallon. Go get some perlite, sand, and either a good soil like the fox farm or happy frog soil, or get cheap pack of miracle grow gardening soil at homedepot's or lowe's for half the price. Mixed by thirds, I find this to be a good soil base, will be great for draining and nursing this girl back to health. Make up the mixture by thirds, 1/3 perlit, 1/3 garden soil or bag soil mix, 1/3 sand, flush your plant in the current container with the mixture or peroxide and water and then promptly transplant, water after transplant to push air out of your soil and settle the roots and then remove from your lights or from outside and put in a room with say a regular light, you do this for the first day or two to avoid shock, for the strong HIDs will cook your plant after a transplant, almost every time. So thats it, let it dry up and water 3 or 4 days later, when ever top 1/2inch is dry, water like this with regular water for 3 or 4 waterings and then introduce the nutes again, less than half strength at first then slowly work up. Hope you keep her going, good luck