I'm lost...

Brittany • Been blessed with my rainbow baby girl. 21 years old. Married💕
So I am currently 21 weeks. And I can't help but feel fat. I've always been concerned about my body weight and gaining all this weight makes me feel horrible about myself. I don't feel attractive at all. I was just wondering if anyone has any tips on how to feel better. I know I should feel over joyed about my princess, but I only feel fat. Any advice would help. 
This was just a few days ago.