Why is my iPhone 7 not connecting to wifi

I just got my phone bill yesterday and I used 4GB this month and found out that my phone has not connected to my home wifi for over a month.

When I input my correct password for the wifi (I know its correct because I input it for Netflix and my desktop) my iPhone tells me I have the wrong password.

I have reset my phone 4 times and disconnected and reset my router 4 times. I have cleared my history and my cache and closed all my safari windows. I have disconnected Wifi Assist, Bluetooth and even Cellular Data.

My phone keeps telling me I can connect if I get close to my mac that is using wifi. No luck.

What now? Time to waste an afternoon on a visit to the Genius Bar?