Macbook Pro will not detect any wifi

PLEASE HELP! I am currently using a MacBook Pro, and I also have an airport extreme. I just upgraded to the newest Mac OS Sierra 10.12. Yesterday, I was able to use the internet with no problems. Today, I log on, and it will not connect. I have tried resetting the airport extreme and also restarting my computer and still nothing. The weird thing is that every other device can connect to the network with no problem, just not my MacBook. It also works if I am directly connected via ethernet cable, just no wifi. Also, when my computer looks for available networks to join, it finds nothing. Typically, it would find every network out there, but it will not even find a single one. I hope this, is enough information for someone with the knowledge to understand what is wrong! Please help me, I need to be mobile with my laptop and not be connected all the time!