Rob, I can relate to so much of what you have said. I too, have had moments when I just couldn't be in the house that my husband and I made a life together for 14 years, so I took several little trips with my daughter, who was here with me for this first (very hard) month. She is gone now and while there is a part of me that wants to start to get rid of his things and make some changes, a part of me feels guilty for wanting to do so.
I do not sleep well either; unless I take the Trazadone that is prescribed for me, and even then sometimes it is 1:00 am and I am still awake. In those moments when I fall asleep at a decent hour, I am up at 4:00 am. There isn't a day that goes by when I do not shed tears at some point in the day.
I have been told that all of this is normal and that things will get better. The people on this forum seem to have the wisdom that I don't right now. Listen and heed some of their words.