I don't know what's going on with G, but check your pages in G. Mine have been slowly dropping over the last few hours. Not one big drop, just maybe 5 - 10 pages every 1/2 hour. I am starting to believe someone really broke something at Google.
I believe Google is broken too, my serps have gone down - from page two for a certain keyword, to cannot be seen, which is sorta impossible, as I have a ton of backlinks, and content, and great seo.
My friends, how is that impossible? G is going through an update now. I experience that with my sites every 3 months of so. Bear with it, it'll come back