I lost a folder I was working on by entering a command and I need help understanding what happened

So here’s the situation : I’m still new to using terminal commands and I was experimenting a little bit. I wanted to rename a directory by using the command mv [directoryName] ./[newName]. I miswrote the command like so : mv [directoryName] ./.[newName]. The directory disappeared from its original location and I assume it has gone somewhere, but I can’t find where the added . would have taken it. Also, note that I used the command while being Root.

Does anyone of you, by any chance, could help me understand what happened and where it would have put the folder?