I have a Mandarin Orange bonsai tree I received in Feb. A couple days after I got it, it started to bloom. Recently all the leaves started to fall of it and the bark on some of the stems are hardening. The oranges have not ripened and one fell off this morning. I first thought I might have had the light too close and moved it further away and it kept getting worse. Then I thought I might have been over watering and stopped watering it and it continues to get worse. Does anyone have any advice or know what might be going on with it?