Guild Wars 2

Hi, ever since yesterday’s patch i don’t know if its lag or crash, but whenever i do dungeons out of no where my game would stop responding. Theres no error message or anything( i have it on window mode btw), and out of no where my game screen would freeze and when i try to click on the screen again it would say (Guild Wars 2 not responding) and the screen turns gray. Ive never had this problem before the Jan 21 patch.

Also sometimes out of no where, when i go to new maps my loading page would take up to 5 mins to load.