Hi, I'm trying to help my mom take care of this succulent she got as a gift for Christmas. From what I've been told, it's supposed to be an Echeveria Rainbow. She initially planted it in a ceramic pot that didn't have very good drainage and watered it whenever the top bit of soil seemed dry. It started dying, so she transplanted it into a different ceramic pot with better drainage, then watered it well afterward. This was about a couple weeks ago. It hasn't been watered since, but now the leaves are shriveling up and falling off. The strange thing is, it's also had new leaves come up. Would anybody have any ideas about what's wrong with it and how we could fix it? Thank you!