Need your opinions!

Micayla-Jane • TTC baby #1.👶🏼
My dad says I'm too thin to get pregnant.. I've made it a point in the last 4 months to gain weight. I've gained 16lbs in the last 4 months - healthy weight, not fatty weight. And I'm currently 112.2. I'm 5'6. Am I too thin to have a healthy pregnancy? Should I continue gaining weight? Or am I safe?