I've had this plant for about 5 years, it was doing really great, I've repotted it three times and it just kept growing . Ive kept It In the same windowsill too. It's been a little sad looking a few times, but not like this. A portion of the main stalk is brown and dry, all of the rest of the stalks are extremely shrunken and deep green. I water it about once or twice a week. What am I doing wrong?!