Constantly disconnecting from server

I've been playing just fine right up until last week. Then today I want to log in to do some of my my weeklies, but every time I interact with something, I disconnect. I'm in a Rhalgr's Reach, I disconnect. I enter an instance, I keep disconnecting after like 5 seconds until the group kicks me out. I claim veteran rewards from the mail, I disconnect.

I can't play the game like this. Everything else works out just fine, it can't be something on my end. I changed nothing since last week. And I reset my router upon urging of fc members, who I can talk to if I go somewhere desolate like my fc house. It made no difference.

Does this problem sound familiar to anyone? Is there anything at all I can do to fix it?