Let it grow....if your worrying already, you arre going to have one frustrating grow. Do your best to educate yourself and provide all the essentials. The grow FAQ on the top of this web page is a great place to start.
its just needing sum nitregon at that stage. perfectly normal but yet just a bit to smalltofeed yet wait about a week then start with 1/4 strength and work up to full dose ove the next couple weeks.
That seedling is overwatered and Nitrogen deficient. Stop watering it so much, begin feeding it at a quarter strength of your recommended dose, and get another CFL or two - one isn't going to cut it for long.