PLEASE HELP. This picture is from last Summer when I first bought it, since then it grew and grew and grew (and looked great!) and is now 15 inches tall. I came home from a weekend away and I found it totally bent over! Like lying on it it's side! Everything else about looks good except it suddenly won't hold itself up.

Was it a lack of water? Could it be the cold temperature in the house at night? I make sure not to over water it, so maybe each time I watered it, I didn't soak it enough. It almost seems like it wasn't supposed to grow so damn tall. But, then why did it?

Someone on this board told me that my succulent is probably an Echeveria. So, if someone also knows exactly what it is I'd appreciate it.

Thanks!

Image link: