The most Maggie has gone is for 10 hours. That was so hard, so I really feel for you. Please follow Kelly's advice and get some help so you can sleep.

I found what helped me was to take breaks from trying to get her to sleep. It helped us both. The one thing that put her to sleep that one time was the dryer, I think it blocked out the world for her. Pity it has not worked again. But sometimes in desperate times the strangest thing will work.

Good Luck