Radiator fans not running

Yesterday, I changed my radiator fluid in my 2005 Buick Lasabre. I drove the
car about ten miles today, and noticed that the engine was getting a bit hotter
than normal. I've been monitoring the temperature all day. Tipically running
185-200, but later this afternoon, it spiked to 220ies.

So I let it cool down, and as I was sitting there, I realized that I put the wrong
coolant in it(greenish/yellow). So I ran to auto store and got some Dex-Cool.
Let it cool down again, drained and replaced coolant with the Dex-Cool.

Turned the engine on and poured more coolant into the radiator. I let it run for
5-10 mins and the engine started to get hot, but the fans never turned on and
the hoses to the radiator and engine block seemed empty of fluid.

I'm stuck. Help.