For the longest I kept waking up feeling him laying next to me when I knew he wasn't. A body pillow works well for that. You can wrap right around it. Ambian CR works great just use with care. ( I work for dr's) Xanax will get you through this just don't abuse it.
I used to call them 3:00 epiphany's. The epiphany being that I'm middle aged and going through this sh#t.