Urgent! Something is wrong all of the sudden with my site…

Can you please look at my site. It was fine about 3 days ago, then I didn’t work on it. Now a lot of weird things are going on. Drop down menu options do not show up. The home page does not load properly, the slider graphic doesn’t show up, you can not log in using the upper right log in. I would think it was something having to do with my computer but the same thing is happening on my laptop and on my desktop. I have used Chrome on both, Safari on both, and I have successfully opened any number of other websites. I am concerned.

my webpage: http://www.newdermeo.com