Struggling with gaining weight

I know alot of people struggle because they think they have gained to much weight but here I am..

Second pregnancy hoping this time it would be different. That finally I would gain some weight you know look a little bigger and full but nope! All belly and om skinny as always. People tell me how unhealthy I must be or ask if the baby is ok because I'm so skinny. It's really hard when people make comments like that. My baby is healthy I've gained some weight and yes I do eat!!!! Just wanted to vent idk if anyone else feels this way it's just getting to me really bad.