Whether I'm on discord, playing a game, or browsing the internet, my latency has been all over the place. Spiking up to 1,000 ms and then back to do 50, back up to 500, and so on and so on. Nothing is being downloaded or used by anyone else in my household.
Here is a TraceRT I did to one of the servers of the game which I currently play (Path of Exile)
A speedtest showed nothing wrong. I've had this happen before and the problem magically disappears after a few days. I believe in the past someone told me that they were "Working on a node in my area" and thats why I was lagging. The Comcast App shows everything is fine and no outages.
Update: Did a complete powercycle of my computer, router, and modem and everything is looking okay for now. Will come back with updates
What modem do you have?