The leaves of a plant will hang when it thirsty . From what I can read you have given that plant 0.075 litres in the last few days? (50ml+25ml)....this is very little water, hardly anything...it can take much more as long as it can drain away. The topsoil in the pic looks dry so could be really thirsty bro, I would be giving at least 1 litre to that plant during waterings but hard to tell scale from pics. Plant looks nice though, good job.