Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello, recently, after around 19:00 server time, I've been getting massive unplayable latency issues. Huge lag spikes lasting minutes and latency going up to between 5k and 10k. I didn't have this issue for the first few days after release, even with 5,2k people online and my internets bandwidth is fine as well.

I also get DC'd after a while and can't log back on, get stuck at "logging in to game server".