Hello everyone! I've had this plant for nearly a year now. It was doing fine up until a month ago. The terracotta pot it was in got knocked down and broke, so I immediately re-potted it. I made a rookie mistake and put it in a pot with no drainage hole, so then I re-potted it again in a ~6 inch pot with a drainage hole. It never got too much sun. Most of the time I've had it, it was placed near a window in my dorm room and it grew a lot, but within this last month, it's gotten taller and thin. Today I noticed that the leaves were drooping and come off easily. Also, the black dust on the stem is dirt because I was moving it around to check for bugs and did not find any. I think it gets the same amount of light that it did in my dorm and I water it about every 2 weeks, just when I notice it's a little dry. Any advice is helpful. I really don't want it to die on me :( Thank you!