Hi, I purchased a small Serissa foetida a few months ago. About a week ago, I noticed some of the roots protruding from the drainage holes in the bottom of the pot. On this note, I decided to repot the bonsai. I bought a larger tray, but I did not prune the roots. It has been about 5 days and today, I noticed the leaves are beginning to wither. They have not changed color, as far as I can tell, but are definitely withering. Does anyone have any advice as to what the problem could be and how to rectify it? The help is greatly appreciated.