Jitter problems

For about the last month, I've had a consistent jitter and packet loss. Most of the time doubling my average latency and losing about 2% of packets. 

Different servers, different services, but the same problem. All automated troubleshooting from xfinity came back with "healthy connection" and I'm connected directly to the xfinity modem by ethernet cable. Solid 1ms ping to the gateway so I'm led to believe it's outside my network. 

Any help would be greatly appreciated!