Struggling with weight gain

Any other mommas to be out there struggling with the weight gain that comes with growing this tiny human? I'm 23 weeks, 1 day, and for the past 4 weeks or so, I've been steadily gaining 1.5 pounds a week! My lower belly is firm like it should be, but I still just look like I've eaten too much pizza, instead of having a cute, round baby bump. I've gained 12 pounds, which I understand isn't a huge amount, but I'm worried it's just getting turned into fat instead of 'baby bump.' I had a completely normal BMI pre-pregnancy, I'm just very self conscious of how I look. I'm trying to tell myself that baby is getting everything he needs so he gets strong and healthy, but I'm getting frustrated. Just seeing if anyone else out there is having this same struggle! Sorry for the long post!