Is it normal to talk out loud to yourself

I met and married my wife 40 years ago after college. Since she died 2 months ago I realized I have never lived alone. I still catch myself doing things as if she were still alive. Things like being quiet when I get out of bed so not to wake her etc. I have started talking to myself out loud. For example as I was getting ready to go into town, I reminded myself out loud of everything I wanted to get done. Is this normal ?