Everything you are feeling is normal! Pregnancy and impending motherhood is a scary thing. I wasn't sure what I wanted when I found out, but as soon as I saw the baby at 8 weeks, I couldn't imagine being without her! I'm 22 as well, was 21 when I found out I was pregnant. I also got engaged to my boyfriend, and we are so excited for our little bundle! We know it will be hard, but we also know that it will be
so worth it

Good luck!