Expecting Mommy Needing Advice

So I'm turning 24 this month, living on my own with my first child and boyfriend. We are planning on getting out of our apartment and into a house soon as well. We found out we are expecting in October and I finally told my mother about it, she told me I was an embarrassment and that she released me and that we need to keep this between us and not post on Facebook because it's nothing to brag about. We've been struggling before, but my boyfriend has recently gotten a great paying job with great benefits and great career opportunities, and before that we have always been able to make things work. My mother thinks I'm selfish and force my decisions on them as if it hurts them and that I'm just an all around disgrace and has taken to pretending it is just a hush hush thing and to act like nothing has changed. I wanted to announce it and be excited, we have the means to care for ourselves and another child and we are all excited about a new addition. We plan on getting married and continuing our family, but I don't want my mother to be upset even though I know at this point that there is no way for me to prevent it unless I live my life as she wants, my boyfriend says I should just do what I want and not worry about her. I'm unsure of what to do at this point, should I just not worry about what they think anymore and try to be happy, or should I do as told and remain quiet?