I suffer from insomnia. I often get all this energy after 6 pm that lasts for hours. I feel so tired during the day but feel alive at night. My body clock is so messed up and I don't know why. It's been 10 years of hell. I do go to bed the same time each night. I seem more sleepy from 9 am to 5 pm even when I'm home. I wake up about 20 times a night.