Need answers not from family.

I am 20 and I absolutely have my mind set on not having children, dont get me wrong babies are cute and all and I thank my mother for having me but I am completely appalled at tge sight of all things pregnancy (no offense ladies). I hate the big bellies, the breastfeeding even though im pro public breastfeeding and I hate the idea of having to take care of anything more than a pet or a man who's already got his shit together. Should I go through the process of being sterile or just hope for a future where I don't get pregnant?