Things like that used to happen for me often, a long time ago when my first husband died. Sometimes the best and worst was when I had a realistic dream that we were doing something together, and sometimes during that dream, I might even be so relieved that he hadn't died after all.
Then of course I would have to wake up. And ... whew.
I'm so sorry for your grief, and I'm hoping with you that it begins to soften. I hope with you that you get to the point memories are a goodness instead of pain.
I know you can get there, from my experiences, but I know it's hard.
Hang in there!