Quoting It's a boy!!!!*3/27/13*:" I have lost another pound :-/ Now down 9 pounds from pre pregnancy weight. Dr told me to stop second ... [snip!] ... am not goin to go buck wild. Dh went and got me a chilli cheese coney with pickles and Tator tots. I can't even finish my tots."
I'm down 15lbs. My doctor isn't concerned.
Start keeping track of your calories. As long as you're getting adequate calories with all necessary vitamins, you're ok. It's better for you to lose excess weight from eating healthy than to gain a lb from fatty, cholesterol saturated foods.