Stress from my mother....

Today my husband and I found out we are have a baby girl! I couldn't be more elated because I really wanted a girl. I sent a out a mass text to a few close people in my family including my mother, she responds by telling me that she didn't want me to tell her with everyone else but okay. I told her I don't know how to satisfy her, I can't seem to do anything right. Every time I have an exciting milestone in my life she feels the need to make it about her. My entire life my relationship with my mother has been a whiplashing roller coaster and I don't want to deal with the stress of it all right now because of the effects it could potentially have on my pregnancy. My mother was absent while I was growing up and even as an adult treats my sister differently than she treats me. I don't complain about it because I can't change it. Am I wrong if I decide to breakaway from my mother for the duration of my pregnancy to keep peace?