What to think and what to do ..............

Good evening,
I lost my mother on July 22, 2014, and I often see her in my dreams, at different stages of her life: young, less young, and at the age of her death.
When she appears, I just see her; we don’t speak. We used to be very close and very open about every subject. When she died, we weren’t on bad terms. In my last dream in which I saw her, while being aware that it was a dream, I approached her and asked her why she wasn’t speaking to me. Her response was to avert her eyes from me (she turned her head to the other side in a silence that woke me up), which made me think that she was holding a grudge against me over something I couldn’t quite put my finger on… I stayed by her side until the end.
It's quite unsettling; I'd like to know what's wrong with her and what to do...
Thank you for your response, if you have one to grant me…
Sincerely.