Chow_13answered grow question 3 years ago I would have to agree with the over watering. It looks like you might have some root rot. I would take 5ml of hydrogen peroxide(3%) and mix it with 5ml of water. Then slowly apply it to the base of the plant. This should kill the bacteria causing the root rot( and any good bacteria) which is why you only want to apply around the base. It is an auto flower so it might not be worth the effort seeing at how stunted it is. I would try that, Give it a week and then decide if it is worth it. Good luck with the girl scout cookies, She is looking nice!!!!
Happy Growing