OP: I want to thank everyone for the incredibly kind words, reassurances and advice.
I did wonder if it there was something that was triggering these feelings. DH and I spoke at length about it last night and while I am not sure this was it, but DD2 turned 3 this year and she is the only child of our 4 that my mother never met. Relatives always remark how she favors my mother. Big blonde curls, blue green eyes. I recognize her smile too.
Just connecting here helped immensely. I spoke with my priest today and I feel like a weight was really lifted. He also recommended a grief counselor for me to see if these feelings continue.
Again, thank you all so much.