You know, when I first got pregnant my lower back hurt so much (from bone separation I think since I hadn't gained any weight yet at that time) that I switched to flats (CL Miminettes are as low as my flats go) for the first time in my life. I even bought a pair of Aerosoles (you know ~"looks like a pump, feels like a sneaker"~). They were so ugly! But I did it for my first trimester. Then, I just couldn't stand it anymore! I finally had to just bear the pain and resume wearing all my beautiful heels! But I think as I enter my 3rd trimester, it probably wouldn't be too prudent to be so stubborn. So back to low heels soon.