first let me begin by saying I know you're frantic and I've been there but there's no need for half a dozen threads for the same plant ctfu...
with that being said it is also overwatered, you can tell because the stem is up right well the leaf is sagging. when to plant is under watered the stem droops also...
no I didn't read anything that you actually wrote on this except the title and picture...
Um... More info dude, setup, nutes, pic of entire plant???
BTW, also may have a cal mag and phosphorus deficiency!
Ate you using nutes?
what brand how much how often in what way?