Well i fixed it with deleting my .dat file in the Guild wars 2 folder.
So far its downloading but all you earlier patches will be deleted, meaning that you have to download the hole game again around 22GB.
You can find the Local.dat file in your Documents folder, in the Guild Wars 2 folder, e.g. C:\Users\[YOUR_USER_NAME]\Documents\Guild Wars 2\Local.dat.
After deleting that file, try restarting GW2 and it should patch up