I now noticed that for my 2 secondary phrases I fell from #10 to #40, and #6 to #19.

I've done no on-page optimization for a couple of months. I've only gone out and gotten a buch of links.

It definitely feels like a slap from Google, although I have no idea why. I gained a lot of links over the past two months, all with nearly identicle anchor text. I wonder if that's the reason.

If so, I'll be real upset. All I ever hear is get more links.