I'm having similar issues as well. I've spent a lot of time looking into it but I'm no expert. To me it looks like its cal mag. You also have leaves pointing down. Which means shes getting too much of something. That's all I know I'm afraid. I'd wait for someone experienced to look at her.. sorry I couldn't help more!
Good luck with you grow bro. I'm gunna keep an eye on this as it may help me also!