I had the same problem, and it turned out the plant just outgrew it's container (half of a 3l super chill soda bottle), even though the plant was maybe 2 or 3 inches tall, you can't really get a great idea of how much room the roots have or how much they "want". Try transplanting it... depending on it's size. I transplanted very carefully (exacto knifed the container open without disturbing the soil much at all) and the plant stopped drooping within 6 hours of the transfer. What size container do you have your plant in and how tall is the plant? also, if you do transplant your plant most likely will continue to droop longer depending on how much stress you put on it so just give it some time before you do anything too drastic.