Missing my husband

He went on a trip to Wa for a ms confrence for work. 4 days, gone for 4 days! This is day 3 and I can hardly stand it. Sleeping feels unnatural without him there beside me and I can't seem to fall asleep at a normal hour. I just toss and turn. I expect to see him walk through the door any minute, home from work or not. I hope he knows how much I love and miss him and how it's not the same without him.