Before I knew I was pregnant I lost 20 pounds because I was trying to watch what I was eating and I had just started a new job which was way more physical than my old one. After I found out, which was around 6 weeks because I wasn't really paying much attention, I asked the doctor about it and they said as long as I'm eating healthy and not on a diet or doing anything drastic, it'll even out. And I've gained a pound. So I think you should be okay, but if you are really worried about it, you can call the doctor for some advice.