It was both sides, and I noticed a clicking or tapping noise while driving it, which wasn't there before. It also gave off a burnt smell.
I bought another set of pads just to satisfy my curiosity, the organic pads, about 8.00 more. Sure enough, I installed these and no more noise and not the intense heat I had before. It's obvious you can't touch the rotor after driving the car, but you should be able to touch the hub. I could feel the heat when I put my hand on the hubcab - I don't think that is normal.
Either way it's all good now. Not sure whether the pad was defective or I installed it in a way that caused it to do this.
Thanks for the input!