how much do you water? every 2-4- days could easily be too much for a plant that size. the top of the soil will dry out fast but that is not what you should use to check, as the rest of the media will still have plenty of water in it for a few days usually. a good method is to check by the weight of the pots. keep an identical pot full of dry soil until you get the hang of it. the weight will change as the plant grows but it is easy to get the hang of anyways. your plant does appear to be over-watered which is a common mistake for beginners. they can go awhile without watering when they are small. you would be surprised. either way, give it a few days and see what happens. chances are it will perk back up. once it does, do not water until it starts to show slight signs of drooping again (this will look different than the overwatered look). then water.