Fonts not displaying

I’ve been using Google Web Fonts plugin and it’s been working perfectly. Now all of the sudden the font styling is completely gone from my site–not even the default template fonts (Lato and Merriweather) are displaying.

Any ideas? I think my head’s about to explode.

Also, I’m trying to make the slider 500px high. I’ve changed the settings and all the photos are 500px, but for some reason they’re getting cut off and forced to be 380 or 400px high.

Any help would be greatly appreciated. Thanks!