Weight gain Rapid

Okay ladies I found out a week ago I was pregnant. I am overweight and short so I know I'm round. Since January I have been watching my food intake and I have been exercising. I lost 19lbs!!! I stopped my excicising in May due to stress in my job (too much going on) I wanted to start back but then found out I was pregnant. I have gained SIX pounds in a week!!!! I don't eat a lot. And I watch what I eat veggies and fruit with some meats. I don't feel like I'm overeating at all and I have only drank water....LOTS of water!!! Please help me?!? Anything I can do?!? I go to the doctor on the 18th and I don't want to hear the whole you're Way to overweight speech. :( :( :( I'm sensitive to this subject so please be kind.