I think my wifi chip is fried. I'm getting 1mb/s link speed on 2.4ghz and 6mb/s link speed on 5ghz and this only started happening today. I'm getting 425mb/s link speed over USB from my phone tethering internet, which isn't what I'm supposed to be getting by at least 200, but it's better than what I have without it.

It's not a router issue as the rest of the network is working flawlessly -- including my phone, which is connected to wifi!