Computer Won't See Wifi Networks

Hi,

So my laptop was working just fine until the day before yesterday. I didn't drop it, etc., but now it seems to be unable to see wireless networks.

Specifically, this morning I tried to connect it to a new network (I'm not at home) and at first it saw about 3 different networks (none of them in the house). Now, it doesn't recognize any networks at all. Is it possible that something is damaged on my wifi card?

My phone sees the network, which leads me to believe that maybe it is not a router channel problem, but something else. I have a 13 inch Macbook Pro from 2012 with Maverciks. Any ideas?

Thanks!!