Here's what I think happened:
I was using Godaddy's crappy web site builder 6.0
I was able to fix it, but since then in just a matter of 2 days I went from #2 to #90! Traffic plummeted!
I really think it's because I updated the site like that and it got crawled and destroyed. I also think the H tags were all messed up.
What a nightmare. I hope it recovers but who knows!
I THINK this is why it was decimated, I can't think of any other reason! I happened right after I published it by accident with the code all messed up.