Unable to find specific wifi network

HI, I'm trying to establish a wifi network connection on my MacBook Pro. I'm running Yosemite and have had no problems until now. The wireless network is our home network and has worked fine for six months. For the last few days I was able to re-establish a connection by restarting my computer, restarting the router, etc., however, today nothing is working. I've also disabled the network and enabled it, but then I'm prompted that the password is wrong.

The network does not show on the network list on my laptop, but all of our other electronics and apple products are connected. Looking to see if there is another trick that can be done or if it could be a hardware/software problem. Thanks in advance for your input.