Soooo big

I'm 23 weeks exactly and I am normally an average size/weight. I've gained almost 20 lbs, about 10 in the last month, and I feel soooo big. I'm really struggling with the weight gain. I'm exercising and watching what I eat/calories. I just feel huge and sad. I don't want to diet or try to lose weight because I know baby needs to put on fat right now, but it is really impacting me and how I feel about my pregnancy.