Looks like you have a plant that has three branches and no top. It could be light stress (doubt it) The seed could have had some genetic misinformation. Are all three branched at the same level? Weed will throw 2 leaves at the same level on the plant at that age. Looks like you have 3. And no main top.

I've grown a lot of plants and one out of 1000 will do what you see. I would keep it and be happy. Each of those branches will grow into a seperate top. It will take longer in vegitative state but you will get a better yield then it's sister.

One last thought. Every plant that I grew that looked like that went male. It was just my luck. I hope yours is a girl.