Game ruining lag spikes.

Hello, first off please excuse me if my english is not good.

Now the problem. I have been playing on the outland server now for about a week. The first 3 days i had no problems playing at all. Everything ran fine, and i was very pleased. Now the last 4 days i have not been able to play on the server really, beacuse every 3-4 minnutes i get this lag spike that will throw me "back in time". Like if im moving up the road, i will suddenly be thrown 10 meters back. I tried deleting my addons since i thought it were those that affected the game, but i still have problems with these lag spikes. Does anybody have any experience with this issue, or perhaps an solution?