This has nothing to do with nutes, mate... it certainly could be transplant shock or over- OR under-watering (both over AND under-watering can cause leaves to droop).... At this point in her life, her roots are NOT the way she gets her water - she gets it from humidity!
It also looks like the soil you've got her in is fairly dense and this isn't good for weed... they need a lot of aeration (more perlite or vermiculite in the soil!)... I think if you were to gently get her out of that soil, amend it with lots of perlite and put her back in that she'd be ok.... you'll want to take a clear plastic dome of some kind (bottle?), spray the inside of it with water and set it over her... then set her somewhere kind of in the shade (or away from strong light) for a day or two to let her recover.
Good luck!