Weight loss?

Hey ladies, I weighed myself for the first time since 7 weeks today and realized I've lost all the weight I initially put on in the beginning, about 5lbs. My friend said it's Normal because that early weight was water weight. But this means I haven't put on any lbs and that concerns me. It's also hard to believe when I look at my big bump and new boobs. I haven't had morning sickness but my appetite has been difficult at times. Should I be concerned?