Arek, lemme just throw this out onto the table.
Call family, see if your mom is with your aunt or grandma: if not, they flip stuff.
Call cops, see if they can find her, eventually they'll find SOMETHING and a missing persons report will go out
DON'T DO ANYTHING, SHE COULD BE GONE FOREVER
Now of course that's extremely drastic, however, I wouldn't be on the god damn forums complaining about how my mom left and she PROBABLY has a 25% of reaching ANY destination.