sorry, i'm lazy; what lights are you using?

i would repot and bury up to the cotyledons (bean leaves) and put some ge daylight flouro's right on top of it (like less than an inch). these bulbs are cool, litterally, and won't burn. that will stop your stretch.

you can find a double shoplight and two ge daylight bulbs for under twenty bucks...

hope that helps, and i'll try to keep up with you for guidance, if you need me.