Hayley Erbert Hough is marking two years since she underwent brain surgery - and marveling at how much can change in such a short period of time. "Two years ago today, I was given a second chance at life through life-saving brain surgery," Erbert, 31, wrote via Instagram on Saturday, December 6, sharing stunning black-and-white pictures of the mom-to-be cradling her growing baby bump. "In these two years I've gone through every human emotion imaginable, the kind that cracks you open and the kind that puts you back together," she continued in the caption.