I've had this tree for years, it bloomed often. It was becoming too big for the pot and I replanted it about 5 months ago. It was doing very well after. The Last few weeks it has suddenly dropped so many leaves! Even the little shoot off he base of the tree wilted. I did not forget to water or watered too much, kept the same habit. What can it be? Please help! Losing this tree is going to break my heart.