More weight gain while exercising?

Shanna • Chase Robert 3/5/18 🌈👶🏻 born 30 weeks 6 days Kidney transplant 2/25/14

I’m very confused and really discouraged. I’ve steadily gained weight through my whole pregnancy. I regularly exercised before getting pregnant and took a long break when I found out I was. I had a miscarriage last year and really wanted to take it easy. I stated working out again and really watching what I’m eating 2 weeks ago. Since I’ve started again, I’ve been gaining weight way more rapidly than before. I’ve gained 3 pounds per week for the past 2 weeks. Has this happened to anyone else? I would really like to stay active during my pregnancy, but I’ve gained 30 pounds now. 😔