Hubby, you said you had a sudden feeling that Margaret was walking beside you.
When I'm dog walking and (usually) feeling extra low I deliberately call up the image of George walking beside me, his arm around my shoulder. Yes this makes me cry but he comforts me So I feel less low. I talk about how I miss him , and in my mind he answers me. Again comforting me and telling me not to cry. I know he doesn't want me to cry for him. So I try not to. Don't often succeed but will have to try harder.