could it be that you're too excited because that happened to me when I found out I was pregnant and it happened for about a week or two I think I began to sleep well once I had already told my family and my husband and everybody at work so try it, maybe it'll work for you good luck!!
Same thing happens to me I now use a pillow between my legs when I sleep helps line up the spine and takes pressure off the pelvic and knee bones . good luck
Anxiety is normal during pregnancy. Try to drink a glass of warm milk before bedtime. Try to lay down in bed and do nothing...dont read and do not use ur gadgets to avoid stimulation. Close your eyes and do deep breathing. Then try visualization techinque. Also , try exercising during daytime. It releases tension/anxiety and improves appetite. I do that all the time when i find it hard to sleep.