Since I got pregnant, my body auto wakes every 3 hours. Is this a norm?

I was one of the few lucky mummies who managed to sleep through the night, right up till I gave birth. My best buy was the pregnancy support pillow, which really helped to give extra support. It's a long U-shaped pillow. Yes, it is quite common among pregnant women due to the extra pressure and weight of the baby and other factors. http://pregnant.sg/articles/tips-for-better-pregnancy-sleep/gallery/image/third-trimester?q=/articles/tips-for-better-pregnancy-sleep/gallery/image/second-trimester&/