Obscenely high levels of packet loss

Hi. I noticed a massive wave of packet loss that started two nights ago. It completely grinds my connection  to a halt, and I can't really do anything with the internet now because of it. It's been basically happening the entire time since I first noticed it two nights ago, and it's usually having huge packet loss spikes every minute or two. 

https://imgur.com/Ovz337y - Modem Levels
https://imgur.com/GEk9JzD - Pingplotter Graph

Using an XB-7 supplied by Comcast, had my own router and had the XB-7 in bridge mode but have been swapping back and  forth between just the XB-7 and my router to see if it helps (It  doesn't)

I have a technician coming Tuesday, but I work from home right now because of Coronavirus and this is HEAVILY impacting my ability to get anything done, so I'm just fanning out as hard as I can to see if ANYONE can help me atleast understand what's going on. I'm scared of a Technician showing up and then saying, "Looks good on my end, bye!" because the ones here have done that before. 

There's been maintenance in my area today and yesterday but neither of them have had any effect on my connection.

I know the obvious answer is just wait and see, but I just want to atleast know what's going on.