Scared of being huge

So I’m one of a twin and I’ve always been heavier than my sister. Found out im pregnant and I’m so scared I’m going to be gigantic. My mom has always tried to get me to loose weight and I did last year. I lost about 30lbs. I’ve picked up about 9lbs since then and still big. Im scared I will be ridiculed by my sister and mom when I’m 8months pregnant and a beast and then after I gave birth to loose all the weight. I’m trying to no over do it with food and stuff but it’s hard when you constantly hungry.

I’m currently 8+4 weeks