No - some people remember their dreams better than others or are more open to these things. Also you can't be sure that other people's dreams are actual communication, although sometimes you get an idea one way or the other.
Inshallah she would not have reasons to be angry to you after she has passed on - many things we are angry about in life become unimportant once we are not dealing with the material and social realities of this world. Allah also says in the Qur'an that He will remove bad feelings from people's hearts in jannah.
However if you are concerned that she is angry at you, you could pray that she forgives you.
Sorry to hear about your loss.