Terrified

Im terrified to become a mother. I live with my husband and we're 10 weeks pregnant and I wanted this.. to be a mother. I was so excited, I still am, to be creating a life, but now im scared. Im going through challenges now that makes me question if im going to be a good role model to our child. What makes a good mother? On top of everything we're young (above 18). Im just losing faith in myself... or are the hormones just putting me on this train of thought. . . ?