Overwatering?

After looking at your diary, I would say your problem is the opposite, a very thirsty plant and not an overwatered plant. I would be giving her a very good drink, or even standing the cup in a saucer of water for an hour or two and letting the soil become completely moist again. The small cup you have her in would almost certainly be just about all roots and with very little water holding capacity. I am sure if you give her a very thorough watering, she will perk up again. Growing plants in such small cups will always lead to problems. Hope this helps,......... Organoman.