How old is it? How tall is it? Got any pics? If it's still a seedling or in the veg stage really, and your plant is stretched from lack of light, then you can bury the stem up to the first leafs to give the plant some stability and the stem in the soil will start growing roots out of it. I would recommend putting an oscillating fan in your room either way to make the plants stronger. Also, depending on your lights, you might want to move them closer.