Our Simmons BeautyRest Pillowtop Mattress is 16 months old. For the first 10 months it was comfortable and I had no complaints. Around that time, my pelvic joints began aching, followed by my back and shoulders. I went to the Dr. and even had x-rays. Most of the aches went away when I got up. My body now hurts after about 10 minutes of lying on my side. Presently, I sleep on the very edge, where it is the firmest. Around 4 AM, when I wake up  with an aching back and hips, I go off to sleep in the spare bed room on an old, comfortable mattress. This Simmons mattress has a ridge down the middle(...