Two days ago, my internet suddenly became terrible. Webpages take an eternity to load, if they even load at all. Most of my games won't connect at all, and when they do I have crazy high packet loss (>60%). However, Speedtest, games, and ping tests tell me that my ping is no higher than it normally is. My down and up speeds are also at normal levels (25 down, 5 up). I normally use WiFi, but these problems persist even with a wired connection to my router. It also persists across other devices- currently, my phone loads webpages faster on an LTE connection that it does on my network.
I'm used to solving minor network issues, but none of my normal tests have shown anything abnormal. I'm thinking it has something to do with my ISP, but I want to try every other avenue before I have to contact Comcast (ugh).