Am I too skinny???

Olivia
Hello! I will be 8 weeks tomorrow with my first. However, some people have told me that I'm too skinny to have a baby vaginally. I'm almost 21, 93lbs, and 5'2. However, I've never worn anything bigger than a size 3 in junior's pants. Right now I wear a 00. Am I too skinny to birth a baby vaginally? I've always been quite small. Another concern of mine is what if I don't gain enough weight. It's always been a challenge for me to gain weight.