I had a similar problem with waffles the last couple of days, In happening the exact same way you've described.
I had Intending reloading my OS anyways but I was putting It off for the last couple of weeks, but the problem with waffles just brought It to the forefront.
That's what Ive been doing the last couple of hour's, everything Is working sweet now.

I didn't find a solution to the problem, but what I did notice was I use the Opera browser.
When I typed something like Firefox or Opera or even Safari, the web pages didn't come up. It was things like Ebay and Amazon witch led me to believe that the Browser had some type of virus.
It was happing to everything I searched for.

I'm not saying that's what's wrong with yours, but It's something to consider.
As said I ended up reloading my OS, It was pissing me off