20 weeks pregnant. Have lost 20 pounds


Went to the doctor today and have lost a grand Rita of 20 pounds. I started at 250 & now at 230... my doctor is very concerned and making me track everything I eat for the next week and then go back to the doctor. She also had me schedule my 28 week appointment for my sugar test but also an ultrasound.... I am so frustrated I'm not trying to lose weight. I'm a big girl to begin with. But I just don't know why my doctor is so concerned :/ has this happened today anyone else???