Almost looks like a n def.? Is it on nutes? More info is needed and can promise you someone will come along that knows better and answer you... Just got to wait a bit sometimes

it's not going to die in a day... So don't stress it! Also if very very concerned, may I suggest you google cannabis plant deficiencies. You will get tons of images and info on it and probably will be able to figure it out yourself

plus it will make you feel smarter

:stylez rasta smoke:
Edit: I did one for you using the AFN search feature
https://www.autoflower.org/f90/deficiency-pics-16474.html
:karma cloud: of healing being sent to your lady!
Also know there is a guide her