Phil, I don't know if this will help , but whenever I can't sleep, I breath out then hold my breath ,count to 30 in my mind, Then breath in. I repeat this process over and over. It gives you something to do while lying in bed, it takes your mind off your troubles, and when you do breath in its pleasant. Usually I'll drift off. If its too hard to hold till 30, then try 20. There is no magic number. Doesn't work for everyone, but maybe worth a try.