Is it normal to keep on dreaming about an ex husband recently divorced?

I am recently divorced and i am the one who wanted the divorce. Of late i have been having dreams about my ex husband me wanting him back and him not wanting me. In real sense i do not wish to get back with him so i do not understand where the dreams are from. At times though if i accidentaly see a pic of me him and my son i feel a slight twinge in my heart. I wonder why while i knwo very well the marriage was not healthy for us all as we used to fight alot. Is this normal?