I always feel odd about these threads because teenage pregnancy is top fodder for trolls, for some reason, but I always post because you never know when it might be real.
I got pregnant at 19. My mum was devastated, furious, hurt, every emotion you can imagine. At first I didn't understand it; I got angry too, the way you are now.
Throughout the pregnancy our relationship improved as she realised that I had no intention of giving up uni or even taking any time out, no intention of relying on her for childcare and no desire to give up on my ambition, and I realised that she was just worried for what it meant for me and my future, understandably so.
She was at the birth of DD and, two years later, she and I have such a close relationship. What she is saying now is coming from a place of shock and fear and concern - what happens next is within your power, really. You can walk away and go it alone; you can fight with her until your relationship is broken beyond repair, or you can prove to her that this is something you can cope with, and although you may ask for her advice at times, and sometimes you'll just need a hug, you are going to take responsibility for this pregnancy, whether you continue with it or decide to have a termination.
You are seventeen and pregnant. Now is not the time to kick off because your mum is angry with you (understandably so, and I say that as someone who has been in a position not dissimilar to yours). Now is the time to pull your socks up, grow up very quickly, and prove yourself.