Anyone else not feeling like a "woman"?

I feel like I still have the body of a 15 year old! I'll be 20 in March and I'll be 16 weeks Friday! Other than somewhat bigger boobs than what I had, I'm tiny (5'2) I want and NEED to gain weight!!!! My friend is 26 weeks pregnant and she has boobs and everything she was skinner than me before we got pregnant! Ugh it's not fair 😩😪😞 My boyfriend says he sees a difference in my butt and boobs and he loves it but I just don't!