Seriously

So beginning of my pregnancy I was 250 5'7 and today 16 weeks later I'm 251 and the doctor freaked out. Don't gain weight! Don't gain weight! Now I get it I'm not the ideal weight but for gaining only 1 pound in 16 weeks I would say not to shabby. Am I crazy? I've been told prior that even though I am over weight I should gain at least 10lbs. Luckily this isn't my main doctor but someone in his office. I was just shocked.