I am having the same problem tonight. My mind is racing, my body is crying out for sleep, every nerve is on edge. When I try to lay down, they feel of the sheets on my skin hurts, my legs crawl, my mind speeds up and I can't shut it down. I am so tired, i want sleep. I have a busy day today and tomorrow, I need to sleep. i don't have any problems sleeping during the day. I wonder why that is?