Hey, I'm really in a distress now. I live in Houston and I just bought Dracaena Massangeana four days ago from IKEA. It was yellow and healthy in the store. I watered it moderately for once and placed it around 5 feet from my window so it wouldn't directly be placed on the sun. However, yesterday, it began to die. Its leaves are covered with brown moist-looking thing. Some have beem covered all and dying. (I attached pictures). I really need your help because I'm really sad since I love plants.