Hi, I m 13 and 5 4. Lately, I haven t been getting much sleep at all. It s been two weeks, and I ve slept about four of those nights. I have slept during the day, all day, for most of those. Anyway, after all those all nighters, would that have an effect on my growth? I want to be tall, so I m worried. After how long does lack of sleep start to affect growth? I have slept quite a bit during the day, and yesterday I slept 20 hours straight. Has my growth already been stunted?