third trimester insomnia

Who else is suffering with sleepless nights and napping throughout the day!? I slept like a baby in the first and second trimester. I was sleeping normal hours. And now my body is all wacky. Even though i walk and swim and do prenatal yoga, I cant close my eyes until 4-6am! Wake up at 8am. Fall back asleep from 1-4 pm. I need to know im not alone. Who else has an outrageous sleep schedule?