Looking through your diary, you might have a few problems going on .
1 over watering. From week 1 for a plant this size only needs just a a few sprays of water with a bottle. Week 2 looks like you let it dry out a bit but then again in week 3 looks like you over water again not letting oxygen get to the root zone will cause the droopy leafs.
2 what’s your water parameter growing in soil you should be between 6.2-6.8 if I’m not mistaken. Also what’s your EC . To high at this stage can have your root zone to hot causing your plant to lock out nutrients. Causing the yellowing from the bottom up (nitrogen deficiency) . Hope that helps if not please feel free to hit me up . Good luck to you