Help! My site has gone wonky!

Hey guys! In short, I've not worked on my site in over a week (been busy crafting for the art shows). Just now, I went on to my site and discovered that my menu has taken on a mind of its own, my site will not load in chrome, and it does load in firefox and IE, but the menu does not show drop-downs. Since I was last on, there is a new WP release. I have made the update and all plugins are current. Please, Any thoughts?