Frustrating Premonition

In my vision, my sister is pregnant with her second child. I am probably fifteen. We are watching TV when her water breaks. I am thrown into a panic when my dad and brother-in-law don't answer their phones. I grab the car keys and help my sister into the car. I have little experience driving and I was driving really fast. I am so scared that this is going to happen because every dream that I remember when I wake up always, always ends up happening. I told my sister, who knows about my dreams, and she just joked about it saying, "Wouldn't that be a story to tell the kid? On the night you were born, baby, your aunt almost killed us." I wish she would take it seriously. She is old enough to have kids and never has any worries, but this is one of those premonitions that scare me. I have no clue when this is going to happen. Why on my Mother Earth, would I have this vision? It only is making me panic and then I scare myself more. On other visions, I can keep myself in check because I am not directly involved. This one is different, I have to get my sister to the hospital to deliver my niece/nephew. I just can't do this, it is making my other visions clouded and these visions are how I keep my life the way it is. This is the first one since my first premonition that actually scares me. I don't know what to do!