Trying to figure out whats wrong with this tree. Leaves are mostly facing downward like in the picture. Many are turning slightly yellow on the edges and dropping (can see the tip yellowing in the picture). Have been losing alot of leaves everyday. I have been battling aphids, but feel like I have them mostly under control. I pick off 1 or 2 most mornings, but never a huge amount. I have been fertilizing with bougain once per month like in the instructions and watering roughly once per week while its inside. Currently in an east facing window with a grow light as well. Any ideas?