Is this normal??

Tiffany

I got a checkup and ultrasound yesterday.. and apparently at 19 weeks I’ve gained 20 lbs so far. I was 120 pre-pregnancy and now I’m 140.. I still work out as much as I can 3-5 days a week and I do eat more but I don’t pig out and i eat healthy too. I’m so scared I’m gonna get gestational diabetes or something.. how can I slow this weight gain down/lose fat??