That is a stout little plant! I must say, it seems that you have done almost everthing wrong you can do. I KNOW, because I did all the same things a few years ago myself. Mistakes teach you better than books any day. Use the info in the previous posts.
Lights about 2 - 3 inches from plant.
Dont over water
Dont over fertilise. You can always give the plant more, but you cant take it back.
DONT!! bend, twist, fold, spindle or mutilate your plants. Let the fan work for you.
When transplanting, be very gentle with the roots. Root damage will stunt a plant in a heartbeat.
And remember this is not all that hard to do. Plants want to grow and will do so with just the basic needs. Light, water, food and a little TLC. Enjoy your harvest. I gotta go and check on my babies.