Really need some advice, feeling a bit lost

So my entire life I have always very adamantly been against the idea of having children, and spent a lot of time disliking them in general, and have not been shy about my opinions on parenting.

What I NEVER expected was to find a boy that I fell completely in love with and would be willing, and even excited, to have children with him.

It's something we struggled with for a very long time just because I was so hesitant to even try to change my mind, but after losing him briefly I realized that I want a future with him, and I will set my pride aside to do so.

My biggest thing is that I can just hear all of the people in my life making the comments, "I knew you'd change your mind", or "remember when you swore you wouldn't have kids" and the thought drives me insane, and it makes me so angry because I absolutely know it will happen.

But also I almost feel ashamed of myself for changing my mind. I always felt so strong for sticking to my beliefs, and now I feel like I'm going to be just another statistic, and I'm so afraid of being just a mom. Things that I never thought I'd have to worry about are suddenly concerns and I'm just feeling a little lost about who I am.

Has anyone else been in this situation, or even something similar? How did you deal with the petty comments?