The minute I started the game it was extremely laggy. What gives?

well you should provide a little more info man, like what kinda pc you got?
ram? gfx card?

also have you done things to try to reduce the lag?
setting game, and then even maybe pc to lowest res,
also making sure your running the bear minimum in gfx settings from in game menu.

also exactly what kind of lag?
most popular seems to be a ruberbanding,
i'v seen it happen on some friends lower end pcs, they just avoid open field and grind dngs,
seems to be lag free for them in there.

hope you get things going good.